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 Input:
What did some ancient societies use to reflect light? (A) wood (B) plants (C) clothing (D) rocks

Ex Output:
D


Ex Input:
A skill some humans have is (A) ten fingers (B) vision (C) heart beating (D) talking

Ex Output:
D


Ex Input:
Which would likely render a habitat dead? (A) planting new trees (B) a light drizzle (C) a human camping (D) an apartment complex

Ex Output:

D