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:
How is a place of lower elevation affected by flooding when compared to a higher location? (A) It is more affected by the flood (B) It is impossible to flood a lower elevation location (C) It is more resistant than a higher place (D) The lower area is already flooded

Ex Output:
A


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

Ex Output:
A


Ex Input:
Explosions can cause harm to what? (A) clouds (B) radio waves (C) ground crawlers (D) airflow

Ex Output:

C