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:
A prickly pear absorbs nutrients from (A) below it (B) far from it (C) beside it (D) above it

Ex Output:
A


Ex Input:
A battery converts chemical energy into (A) energy stored due to the relative positions of charged particles or electric fields (B) energy stored due to the bombardment of particles (C) energy stored between the cells of nonadjacent particles (D) energy that is broken down in particles

Ex Output:
A


Ex Input:
Solar energy comes from the sun and does which positive thing? (A) electrocutes birds (B) starves babies (C) freezes water (D) sustains mammals

Ex Output:

D