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").

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

Example Input: A rock may be used as a shelter by a (A) chicken (B) spider (C) giant squid (D) deer
Example Output: B

Example Input: If a kitten is unable to nurse from birth (A) it will expire (B) sleep (C) decide to leave (D) it will laugh
Example Output:
A