Chronic fatigue syndrome is characterized by prolonged fatigue, muscul

Read the below lines and you will reach to the conclusion.



One drug was tested on those who suffer from chronic fatigue syndrome. This drug lessened the severity of all of the symptoms of chronic fatigue syndrome.

From this the conclusion came out that chronic fatigue syndrome is caused by one virus.

We,now, can prethink that one drug that was given actually countered 3 problems of chronic fatigue syndrome in one or the other sense.

1. Either it acted on all 3 equally.
2. It acted on 1 and that 1 acted on other 2.

Option B highlights the 2nd point .

Therefore B is correct.

Chronic fatigue syndrome is characterized by prolonged fatigue, muscular pain, and neurological problems. It is not known whether these symptoms are all caused by a single virus or whether each symptom is the result of a separate viral infection. A newly synthesized drug has been tested on those who suffer from chronic fatigue syndrome. Although the specific antiviral effects of this drug are unknown, it has lessened the severity of all of the symptoms of chronic fatigue syndrome. Thus there is evidence that chronic fatigue syndrome is, in fact, caused by one virus.

The argument assumes which one of following?

(A) All those who suffer from prolonged fatigue also suffer from neurological problems.
Wrong. Conclusion states that chronic fatigue is caused by one virus. People from prolonged fatigue also suffer from neurological problems strengthen it, but does not provide assumption.

(B) It is more likely that the new drug counteracts one virus than that it counteracts several viruses.
Right. Drug is showing positive results, and if drug is made to counteract for one virus only, then the disease is of course made of one virus only.

(C) The symptoms of chronic fatigue syndrome are dissimilar to those of any other syndrome.
Wrong. How does it help the conclusion that chronic fatigue syndrome is made of one virus? It's symptoms can be similar to other syndromes which are made of multiple viruses.

(D) Most syndromes that are characterized by related symptoms are each caused by a single viral infection.
Wrong. We cannot compare one disease with another on basis of its single viral infection. There are alot many factors involved.

(E) An antiviral medication that eliminates the most severe symptoms of chronic fatigue syndrome thereby cures chronic fatigue syndrome.
Wrong. This is a conclusion and not an assumption.