삽입 문제에요.
Some historians believe that by the 9th century the Mayans had exhausted
the environment around them to the point where it could no longer sustain
such a large population.It is possible that in their attempts to increase food
production they exhausted the nutrients in the soil, leading to decreased
harvests. [ A ] At the same time, rising demands for timber for construction
and fuel would have intensified the deforestation around their cities. [ B ] The
inevitable result was environmental degradation. [ C ] Some have suggested
that cycles of extremely long, intense periods of drought coupled with
damage to the environment may have affected Maya civilization during
the Classic period. [ D ]
This could have led to a scarcity of water and to the desertification of the regions
surrounding the Mayan cities.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
저는 C라고 했다가 틀렸거든요. 답은 D고요. D가 답인 이유와 C가 답이
될 수 없는 이유 설명해주실 수 있을까요?