The primary purpose of the passage is to

A. discredit the findings of a study due to flaws in the design of the study

the study is meant to be a demonstration of a finding of which we are not 100% sure. No discredit

B. point out a factor that may modify the extent of certain findings

yes. The study is not conclusive. This is the answer

C. show how results in a finding were unintentionally fabricated

out of scope

D. bolster an argument concerning the interaction of learning and caffeine intake

this is just part of the story not the main idea

E. expand on several oversights of a noteworthy study

out of scope

Regarding coffee’s effectiveness on memory amongst those who do not display “sensitivities to caffeine,” the author assumes that

A. more rigorous analysis in the form of follow-up studies must be conducted
this is actually the main idea not the assumption we want to know

B. the researchers must be more forthcoming in their findings
nothing about that

C. this group displayed a uniform tendency

the group "sensitive" shows Nevertheless, despite the fact that the study represents a random sampling— and thus any number of subjects can exhibit any number of reactions to caffeine—

This means for the group that is NOT sensitive they have a uniform aspect of the symptoms


D. any positive effects will be negated by the effects exhibited by those with sensitivities to caffeine

too extreme
E. this effectiveness was fleeting and tended to all but disappear within a week of the study

not totally true. The effects could be last in the long-term

Select the sentence in which the author expresses an opinion toward the results of the study. In the computer-based test, you’ll click on the sentence in the passage. For this paper-based test, circle the sentence in the passage above.

For this, the question asks for the author opinion NOT for the conclusion which is the last sentence of the passage.
Regards

Question 3 really confused me. Doesn't the last sentence point out that the study was inconclusive? Without reading the entire 2nd paragraph , I would still be not clear what the author tries to say.
What is the difference between the first and last sentence's roles in the 2nd paragraph?

Actually, that to our actual knowledge, we can not draw definitive conclusions on the argument (the coffee)

Regards

Question 3
"Still, until the researchers either release more details of this study, or subsequent studies are conducted, the extent to which those with caffeine sensitivity influenced the observed link between coffee consumption and memory will not be fully known."

Is this line not an opinion.

Still, until the researchers either release more details of this study, or subsequent studies are conducted, the extent to which those with caffeine sensitivity influenced the observed link between coffee consumption and memory will not be fully known.

It is a fact: further researchers are needed to establish the truth or link between blah blah blah

I hope this helps

Question 2 is still quite confusing. Could you please break it down again?

QUESTION #2

(C) is the best answer because the author assumes that those who didn’t display sensitivities to caffeine all had improvements in memory. That is, the passage implies that only those who had adverse reactions to caffeine intake didn’t exhibit the improvements noted in the study. (A) is supported by the passage but doesn’t answer the question. (B) is also supported but doesn’t answer the question. (D) is incorrect because the author implies the opposite: that the positive effects will be more pronounced. (E) isn’t supported by the passage.

Let me know if you solve with the official explanation or it is still confusing to you. I will explain further

still a bit lost. It'd be great if you could explain a bit further if possible