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[quote=ysr]can someone explain how the incorrect answer choices were eliminated ? [/quote]
(1)in general it is wrong to use experimental medical treatments/procedures w/out patient's consent. (2) knowledge of best treatment for mergency conditions can be gained only if consent to experimental procedures is bypassed in medical emergencies.
conclusion - some nonconsensual medical research should be allowed.
(A) is implied. in (2) it is implied that the doctors dont already know the best treatment. this is basically a restatement of one of the premises, not an assumption.
(B) this is not claimed. and it is not required to reach the conclusion.
(C) this is not claimed. the argument is saying that consent should be bypassed so that more information can be gained regarding best course of action in emergencies.
(D) mis-stating the overall argument. the argument is about in cases that are emergencies, not cases that the best treatment option is unknown.
(E) correct, in taking (1) and (2) and reaching the conclusion, it's indicating that gaining knowledge is more important in certain situations.