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:
All the water vanishes from a small depression basked in sunlight on a paved road because of (A) freezing (B) evaporation (C) condensation (D) precipitation

Ex Output:
B


Ex Input:
Factories often add something to the environment that is (A) helpful (B) productive (C) sanitizing (D) posionous

Ex Output:
D


Ex Input:
When water freezes, that water (A) heats up by at least 10 degrees (B) undergoes a change opposite to compressor (C) takes up less space (D) breaks into little pieces

Ex Output:

B