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 of these could be a reason why the stars seem to be in a different place at dusk than at dawn? (A) rotation of the sky (B) rotation of the sun (C) rotation of the earth (D) rotation of the person

Ex Output:
C


Ex Input:
which of these conditions might lead to the inability to move one's bones? (A) the absence of blood platelets (B) an absence of vitamin C (C) muscular wasting might be present (D) a shortage of white blood cells

Ex Output:
C


Ex Input:
Which of these is warm-blooded? (A) a frog (B) a snake (C) a vulture (D) a lizard

Ex Output:

C