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:
Humans contribute to environmental pollution (A) by purchasing products made from recycled products (B) by switching to energy efficient appliances (C) by leaving behind refuse on public beaches (D) by frequently recycling paper and plastic

Ex Output:
C


Ex Input:
Which likely most relies on its looks to reproduce? (A) the shark (B) the horse (C) the spider (D) the peacock

Ex Output:
D


Ex Input:
Corn is eaten by (A) homo sapiens and frogs (B) people and jungle monkeys (C) homo sapiens and deer (D) deer and Bengal tigers

Ex Output:

C