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:
In a decade spring occurs (A) three times (B) twelve times (C) ten times (D) twice

Ex Output:
C


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 of these things is absolutely required in order to notice a bat flying towards you? (A) a hand and an arm (B) eyes and reflected sunlight (C) dogs and scared cats (D) a nose and eyebrows

Ex Output:

B