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: Which of the following items can perform photosynthesis? (A) a flying wasp (B) a speedy cheetah (C) wet dirt (D) a yellow tulip
Example Output: D

Example Input: Though fossil fuels and their byproducts will eventually be used up completely, we'll still have (A) gasoline (B) coal (C) plastics (D) light from stars
Example Output: D

Example Input: The many ponds in the area along with massive swarms of mosquitoes lead the dragonflies to (A) convert the area into swampland (B) experience a sharp increase in available resources (C) leave the area in search of a better habitat (D) experience a dramatic decrease in population
Example Output:
B