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Directions
This question presents a sentence, part of which or all of which is underlined. Beneath the sentence, you will find five ways of phrasing the underlined part. The first of these repeats the original; the other four are different. If you think the original is best, choose the first answer; otherwise, choose one of the others.

In a small-scale pilot study of psilocybin's use in cases of treatment-resistant depression, they established that the compound, which is the psychedelic component in so-called "magic" mushrooms, is safe and effective; meaning that it may one day be an effective treatment for patients with severe depression that do not respond to other therapies.

A

they established that the compound,which is the psychedelic component in so-called "magic" mushrooms, is safe and effective; meaning that it may one day be an effective treatment for patients with severe depression that do not respond to other therapies.

B

scientists established that the compound, which is the psychedelic component in so-called "magic" mushrooms, is safe and effective, meaning that it may one day be a useful treatment for patients with severe depression who do not respond to other therapies.

C

scientists established that the psychedelic component in magic mushrooms, is safe and effective, meaning that it may one day be a useful treatment for patients with severe depression, not responding to other therapies.

D

it established that the compound is safe and effective, meaning that it may one day be an effective treatment for patients--with severe depression--who do not respond to other therapies.

E

the compound, which is the psychedelic component in "magic" mushrooms, being established by scientists as safe and effective, may one day be a useful treatment for patients having severe depression and not responding to other therapies.

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