请教prep上的一个逻辑题

33.   (答案是C，没看明白，请NN指教，非常感谢)

When a caterpillar emerges from the egg on a tree branch, it immediately climbs upward until it finds a leaf bud to eat.  Biologists thought that this behavior displayed an innate tendency to move in the direction opposite to the pull of gravity.  In a recent experiment, a strong light source was placed at the bottom of a tree, and caterpillars, after hatching, climbed downward.

Which of the following hypotheses is best supported by the statements given?

(A) Caterpillars have an innate tendency to move in the direction of gravity.

(B) Newly hatched caterpillars are unable to see in the dark.

(C) Newly hatched caterpillars move towards the strongest light source in the environment.

(D) Newly hatched caterpillars move toward the leaf bud nearest to them.

(E) The eyes of newly hatched caterpillars become less sensitive to light over time.

毛虫一孵化就一直往上爬 以前生物学家认为毛虫是向着重力的反向爬 最近的实验中 在树底下放了个强光源 毛虫就往下爬了

问能得出什么样的结论

c 说毛虫其实是向着有光的方向爬 解释了上述的现象 正常情况 朝着阳光网上 树下有强光时 往下爬