(a) According to a recent productivity study at Harvard, taking a nap at work may be a productive thing to do.

(b) Thirty people in the study were tested four times a day on how quickly they could process information.

(c) It was found that the people who napped for half an hour during the day did better than those who stayed awake the whole day.

(d) Indeed those who did not take a nap showed a decline of 50% in their ability to process information.

답이 (c) 인데,, 어디가 틀린지 모르겠습니다..ㅠ

2. 

(a) Angela Rixon is a celebrated author of books about animals.

(b) Her interest in animals, however, extends beyond authorial one.

(c) She also works as a professional animal photographer for naturalist magazines.

(d) So, she often goes on photographic safaris through Africa and South America.

답이 (b) 인데 이것도 어디가 틀렸을까요...