That placebos can cure everything from dandruff to leprosy is well known. ... ...

According to the passage, when testing a new drug medical researchers give half of the subjects the test drug and half a placebo because
(A) proper statistical controls should be observed.
(B) ...
(C) ...
(D) ...
(E) ...

*This question is included in Nova Reading - THE THREE-STEP METHOD:

 
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That placebos can cure everything from dandruff to leprosy is well known. ... ... 
Posted: 08/10/2014 03:15
Hi we are told to be careful about quotations, but the correct answer is a direct quotation. Any tips here?