계속 오늘 풀다가 딴 거 틀린거는 이해가 되는데, 왜인지 모르겠지만 이건 해설을 몇개를 찾아봐도 이해가안되는데 설명가능한사람있나;;; 개빡대기같겠지만 양해좀..

13. Medical researcher: Scientists compared a large group of joggers who habitually stretch before jogging to an equal number of joggers who do not stretch before jogging. Both groups of joggers incurred roughly the same number of injuries. This indicates that stretching before jogging does not help to prevent injuries. 

Question: Which one most weakens the argument

C.

Most jogging injuries result from falls, collisions and other mishaps on which the flexibility resulting from stretching would have little if any effect

D.

the more prone a jogger is to jogging injuries, the more likely he or she is to develop the habit of performing stretches before jogging.

답은 D라고 하던데, 이해가 잘안가는데 설명해주면 감사하겠습니다. Cuz fs I thought the asnwer was C ㅜㅜ