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").

Input: Consider Input: How does erosion impact a river? (A) enlargening (B) warming (C) heightening (D) shrinking

Output: A

Input: Consider Input: something in a cold place becomes what? (A) warmish (B) toasty (C) hot (D) chilly

Output: D

Input: Consider Input: How should John proceed with eating the fish he just caught? (A) biting right into it raw (B) hold the fish up the sunlight (C) putting his boot on a fire spit (D) striking flint over kindling and placing the fish above it
Output: D