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: Drinking cola daily removes layers from the surface of (A) enamel on molars (B) spoons (C) porcelain (D) the coffee pot

Output: A


Input: Consider Input: Which is a byproduct of a lightbulb? (A) taste (B) death (C) warmth (D) sound

Output: C


Input: Consider Input: Knowing the formula for speed (A) would aid in calculating road time needed to reach a destination (B) would aid in calculating weight of the car (C) would aid in figuring out traffic congestion patterns (D) would aid in using a map


Output: A