Reading Comprehension (RC) | Re: GMATPREP ChallengeQ-The system of patent-granting, which confers tempo

Hi! Have gone through all the responses above, but still not clear why A is not the answer for question 1.

(A) a study suggesting that the semiconductor industry’s approach to patenting during the period from 1982 to 1992 yielded unanticipated results

Because of patent, we would expect patenting activity to be directly related with becoming more innovative.

However, a study (Ziedonis and Hall) yielded results contrary to expectations (unanticipated results).