You are given a science question (easy-level) and four answer options (associated with "A", "B", "C", "D"). Your task is to find the correct answer based on scientific facts, knowledge, and reasoning. Do not generate anything else apart from one of the following characters: 'A', 'B, 'C', 'D'. There is only one correct answer for each question.

Example Input: Why would animals most likely have to leave an area during a drought?
(A) to find mates (B) to find shelter (C) to escape predators (D) to find water and food
Example Output: D

Example Input: One hot summer, a grassland experienced a drought. Which most likely happened in the ecosystem during this time?
(A) The competition for food among primary consumers increased. (B) Nutrients cycled through the system at a faster rate. (C) Less solar radiation was able to enter the system. (D) Secondary consumers became extinct.
Example Output: A

Example Input: A student is writing a report on volcanoes. What should the student include to best help explain how a volcano works?
(A) a photograph of an active volcano (B) a map showing the location of a volcano (C) a table of famous volcanoes and last known eruptions (D) a diagram showing the structure of a volcano
Example Output:
D