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:
What could be used as an electrical conductor (A) A penny (B) Shoe laces (C) Wood (D) A button

Ex Output:
A


Ex Input:
Buttercups can produce (A) their own nutrients (B) grow in space (C) ride horses (D) enter singing competitions

Ex Output:
A


Ex Input:
Rabbits with white fur are hardest to detect in (A) a forest in Spring (B) The middle of a well-lit street (C) Mexico in the Winter (D) the arctic in Winter

Ex Output:

D