In this task, you are given a multiple-choice question and you have to pick the correct option. Answer with option indexes (i.e., "A", "B", "C", and "D").

[EX Q]: An example of seed dispersal is animals eating what? (A) dirt (B) hard shells (C) grass (D) animals
[EX A]: B

[EX Q]: When the old man was much younger, he still had (A) brown eyes (B) baldness (C) gray hair (D) wrinkled skin
[EX A]: A

[EX Q]: Events like thunderstorms and _______ can cause animals to leave an environment. (A) car crashes (B) solar eclipses (C) more available food (D) tsunamis
[EX A]:
D