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:
The earth makes its way around the sun. Because of the constant rotation, the appearance of these is unlikely to be regular. (A) the moon (B) the oceans (C) celestial bodies (D) the sun

Ex Output:
C


Ex Input:
Scraping the side of a cliff may result in (A) ice (B) snow (C) sand (D) wood chips

Ex Output:
C


Ex Input:
What will become magnetic in an electromagnet if the battery becomes active? (A) A nail box (B) A construction nail (C) A plastic nail (D) A wooden nail

Ex Output:

B