Critics of the standard model of memory point out that recalling an event alters the trace of it, so that a memory recalled often is a memory much revised. The observation is correct and is usually offered as a limitation. Consider what the alternative would require. A trace immune to recall would be a trace that could not be integrated with anything learned afterwards, which is to say a record that could be played and never used. The revision the critics identify is not a flaw in the system. It is the system working, and the objection describes its function while calling it a fault.

Which choice best describes the overall structure of the text?

The text states the critics' point, calls the observation correct, then argues that a trace immune to revision could never be integrated with later learning, so the revision is the mechanism functioning. That is granting the fact and reinterpreting it. It does not weigh two models, concede a failure, or set out to explain declining accuracy.

Coins are the most common find on Roman sites, and the least useful for dating them. A coin enters the ground when it is lost, not when it is minted, and Roman coins stayed in circulation for generations. A coin struck in 150 tells you the layer is not older than 150. It tells you nothing about how much younger it might be.

Which choice best describes the function of the last two sentences in the text as a whole?

The first sentence claims coins are the least useful finds for dating, and the last two show why: a coin gives only a earliest-possible date and nothing about how much later the layer is. That is explaining the limitation asserted at the start. No specific disputed coin, alternative method, or challenge to how common coins are appears.

The word 'salary' descends from the Latin for salt, and it is often said that Roman soldiers were paid in it. They were not. They were paid in coin, some of which went on salt like everything else. The etymology records what the money bought, not what the money was.

Which choice best states the main purpose of the text?

The text states the popular claim that soldiers were paid in salt, flatly denies it, and explains what the etymology actually records. That is correcting a popular explanation of a word's origin. Salt production, soldiers' pay levels, and the history of coinage are not its subject.

Ask why the Gothic cathedral has such tall windows and the usual answer is theological: light as a figure for the divine. The theology is real and the builders wrote about it. But the windows are also a consequence of the flying buttress, which moved the roof's outward thrust away from the walls and left them free to be opened up. A belief and an engineering solution arrived together, and the cathedrals record both.

Which choice best describes the overall structure of the text?

The text gives the theological explanation, affirms it is real, introduces the flying buttress as a second cause, and closes by saying both arrived together and are both recorded. That is adding a second explanation without ranking them. It never rejects the theology or claims the builders misunderstood anything.

It would be easy to dismiss the town's insistence on preserving its centuries-old clocktower as mere nostalgia. But the clocktower's continued upkeep has trained three generations of local machinists in precision mechanics, a skill now in short supply. What looks like sentimentality is, on closer inspection, an accidental apprenticeship program.

The author's primary purpose in the passage is to

The passage reframes what 'looks like sentimentality' as something with a concrete practical benefit, the training of machinists, which is the choice about an unexpected practical benefit. It does not criticize the town or generalize to all preservation efforts.