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:
If something is in an ecosystem, it could be (A) invisible (B) vacuum of space (C) lacking life (D) alien

Ex Output:
C


Ex Input:
in order for a person's burger to make it successfully into the toilet, which of these must be functional? (A) the respiratory system (B) the digestive system (C) the circulatory system (D) the destructive system

Ex Output:
B


Ex Input:
An attractive woman got her eye color via (A) recessive emails (B) dominance (C) saliva (D) chromosomes

Ex Output:

D