HACKERS TOEFL READING (2nd iBT Edition) 에서 167쪽 1번 문제 입니다.
연관된 지문:
Single cellular organisms are able to directly absorb gasses and dispose of wastes into their environment, but more complex creatures need to have a system to allow interior cells, far removed from direct exposure with the external system, some way to replenish their nutrients.
문제:
the word "their" in the passage refers to
A: gasses
B: wastes
C: creatures
D: interior cells
인데 답이 C가 아닌 이유 그리고 답이 D 인 정확한 이유가 뭔지 아시는 분 계세요? 도와주세요 ㅜㅜ