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:
Which most likely requires the aid of specialized tissues at the ends of stems? (A) human assisted space travel (B) the quick growth of bamboo (C) cats digging with their claws (D) the slow growth of mammals

Ex Output:
B


Ex Input:
Cellular respiration releases (A) blood (B) waste (C) snot (D) feces

Ex Output:
B


Ex Input:
Trees take in CO2 from the atmosphere for (A) ransom (B) synthesizing food (C) money (D) fun

Ex Output:

B