Caffeine is a chemical compound that stimulates the human central

Question

Caffeine is a chemical compound that stimulates the human central nervous system. Research into the effects of caffeine has been performed by a myriad of companies from different places around the world, and new evidence is published every few months. High caffeine intakes cause nervousness and insomnia in some subjects while drowsiness and repose are experienced by others. Furthermore, some people report a laxative effect while in others it can result in constipation.

Which of the following conclusions is most strongly supported by the information above?

(A) Since there is not enough consistency with regards to results, research of such a chemical is not advantageous and should be discontinued.

(B) The individuality of human subjects creates difficulty when attempting to form a definitive judgement about the symptoms of caffeine.

(C) Caffeine does not affect the central nervous system in all people and, therefore, physiological symptoms can also vary.

(D) Caffeine can act as an addictive substance causing unpleasant side effects and harm to the human body's basic functions.

(E) To conduct more accurate research, examinations should be carried out on larger test groups.

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abhishekb1352 · Answer

Caffeine stimulates the central nervous system and research on its effects are going on worldwide. It produces various symptoms in people and different from one individual to another.
Since different people experience completely opposite symptoms (insomnia v drowsiness, laxative v constipation), individual differences make it hard to make a single, definitive statement about caffeine's symptoms.
Option B matches with this reasoning.

dhart · Answer

High caffeine intakes cause nervousness and insomnia in some subjects while drowsiness and repose are experienced by others. Furthermore, some people report a laxative effect while in others it can result in constipation. The results are wavering , and not constnat ,so maybe status of subjects matters varies like from strong bodybuiders to a lean physique. The individuality of human subjects creates difficulty when attempting to form a definitive judgement about the symptoms of caffeine, so option B looks right to me too

Minka99 · Answer

B  seems like the appropriate choice here.
The task is to select the statement that provides the most accurate conclusion to our passage. Let's dissect the passage:

(1) Caffeine is a chemical compound that stimulates the human central nervous system.  DEFINITION CAFFEINE 
(2) Research into the effects of caffeine has been performed by a myriad of companies from different places around the world, and new evidence is published every few months.  ONGOING INTERNATIONAL CAFFEINE EFFECTS RESEARCH 
(3) High caffeine intakes cause nervousness and insomnia in some subjects while drowsiness and repose are experienced by others.  EXAMPLES FOR EFFECTS TO CONSUMERS OF CAFFEINE 
Furthermore, some people report a laxative effect while in others it can result in constipation.   MORE EXAMPLES FOR EFFECTS TO CONSUMERS OF CAFFEINE

Okay, now let's look at the answer choices:
A)  research of such a chemical is not advantageous and should be discontinued . Just because research is ongoing does not mean it is not useful or necessary!
B) CORRECT! 
C) This is not the heart the passage
D) "addictive" is not once mentioned in the passage
E) size of test groups is not once mentioned in the passage

DraftRice · Answer

As per me option D seems correct as the mentioned problems are basic human functions and caffeine disruptes it , given in passage too..

Vivek1707 · Answer

A. Different reactions don't mean the research is useless. That's way too strong.
B. Correct People react differently to caffeine, so it's difficult to make one definite statement about its effects on everyone.
C. The passage already says caffeine does stimulate the central nervous system. Different symptoms don't mean it doesn't affect everyone.
D. Nothing in the passage says caffeine is addictive or harmful to basic bodily functions.
E. We aren't told that the studies had too few participants. Different results don't automatically mean larger samples are needed.

UpHa · Answer

IMO, B. This option states that different individuals have different reactions to caffeine intake and matches with the stated paragraph.

avoluptatum · Answer

I agree that the passage suggests caffeine disrupts basic human functions ("nervousness," "drowsiness"), though the passage does not seem to mention that the addictive nature of caffeine causes the disruptions.

Bunuel · Answer

OFFICIAL EXPLANATION

Caffeine is a chemical compound that stimulates the human central nervous system. Research into the effects of caffeine has been performed by a myriad of companies from different places around the world, and new evidence is published every few months. High caffeine intakes cause nervousness and insomnia in some subjects while drowsiness and repose are experienced by others. Furthermore, some people report a laxative effect while in others it can result in constipation.

Which of the following conclusions is most strongly supported by the information above?

(A) Since there is not enough consistency with regards to results, research of such a chemical is not advantageous and should be discontinued.

Incorrect.

This is an Inference question, so it is made up of premises only; you need to find a conclusion stemming from those premises:

Premise A: Caffeine stimulates the central nervous system
+
Premise B: Many companies in different places have researched the effects of caffeine. This research continues and reports are published regularly.
+
Premise C: After receiving high amounts of caffeine, some people feel nervous and cannot sleep. Others feel sleepy and calm.
+
Premise D: After receiving high amounts of caffeine, some people experience a laxative effect while others experience constipation.
=
Conclusion: ?

This answer choice jumps to an unsupported conclusion. Although the symptoms experienced by subjects vary, we cannot assume that the research is not useful in some way and that nothing can be learned from it.

(B) The individuality of human subjects creates difficulty when attempting to form a definitive judgement about the symptoms of caffeine.

The argument gives us the impression that caffeine affects people in very different ways. Therefore, forming a concrete judgment about symptoms caused by the substance is difficult.

(C) Caffeine does not affect the central nervous system in all people and, therefore, physiological symptoms can also vary.

Incorrect.

This is an Inference question, so it is made up of premises only; you need to find a conclusion stemming from those premises:

Premise A: Caffeine stimulates the central nervous system
+
Premise B: Many companies in different places have researched the effects of caffeine. This research continues and reports are published regularly.
+
Premise C: After receiving high amounts of caffeine, some people feel nervous and cannot sleep. Others feel sleepy and calm.
+
Premise D: After receiving high amounts of caffeine, some people experience a laxative effect while others experience constipation.
=
Conclusion: ?

This conclusion contradicts the premise A. The fact that the symptoms may vary does not mean that the central nervous system in some people is not affected.

(D) Caffeine can act as an addictive substance causing unpleasant side effects and harm to the human body's basic functions.

Incorrect.

This answer choice introduces additional information about addiction that is not mentioned by the argument. Look for a conclusion based on information found in the premises given.

(E) To conduct more accurate research, examinations should be carried out on larger test groups.

Incorrect.

We cannot assume that the research mentioned in the argument was conducted inaccurately. Contradicting results in subjects do not imply anything about the accuracy of the collection of those results.

Furthermore, we know nothing about the size of test groups used in all the experiments mentioned in the argument so we cannot come to any conclusions in that regard.

Caffeine is a chemical compound that stimulates the human central

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­Caffeine is a chemical compound that stimulates the human central

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615 to 715 in 15 Days (Ria's Strategies)

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Caffeine is a chemical compound that stimulates the human central