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The argument of the passage is: since the same percentage of patients died in both groups, the new drug is not better than the old drug.
What B says is that, although the same percentage of patients died in both groups, one group of dying patients who were given the new drug lived LONGER, by 3 months on average, than the other group of patients who were given the old drug. Thus, the new drug is better to extending a patient's life, hence, more effective, than the old drug.
C) gives no indication of the conditions of the patients in each group at the start of the clinical trial. 1) If the conditions are comparable on average, C) means the new drug tends to KILL those whose conditions are more serious, and save those whose conditions are less serious. Does that prove the new drug is more effective? 2) If the conditions are NOT comparable on average, then C) is out of scope. |
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