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:
Which sustains life yet stopped growing? (A) air (B) a bush (C) a rock (D) a felled tree

Ex Output:
D


Ex Input:
The cell of a plant when photosynthesizing may most require (A) access to roofless space (B) a complete vacuum in space (C) a room with blackened windows (D) dark basement living quarters

Ex Output:
A


Ex Input:
if a person found a toad in the water, where else would it normally be? (A) it would be on the ground (B) it would be in the air (C) it would be in the sea (D) it would be in a volcano

Ex Output:

A