Directions: For this question, select the best of the answer choices given.
A pharmaceutical company developed a new diuretic reported to cause fewer side effects than their old diuretic, which was still being manufactured. During the first year that both were sold, the earlier medication far outsold the new one; the manufacturer thus concluded that reducing side effects was not the customers' primary consideration. Which of the following, if true, would most seriously weaken the manufacturer's conclusion?
Reveal answer
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