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:
pushing against a rolling boulder will decrease its (A) size (B) height (C) impetus (D) ambitions

Ex Output:
C

Ex Input:
The basic outside of our planet is comprised of (A) types of stone (B) frozen green grass (C) solid ice balls (D) molten hot lava

Ex Output:
A

Ex Input:
Sandbars are a part of most seas because there are (A) waves which adjust silt (B) lots of stones in seas (C) places where fish eat (D) sand that needs to be piled

Ex Output:
A