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.

Ex Input:
All of the planets in the solar system formed at about the same time from a large cloud of gas and dust. How is Earth different from other planets in the solar system?
(A) Earth has no natural satellites. (B) Earth's atmosphere is composed of gases. (C) Water is found in all three phases on Earth. (D) Volcanoes release liquid rock onto Earth's surface.

Ex Output:
C

Ex Input:
Which type of air mass forms over the ocean near the equator?
(A) moist and warm (B) moist and cool (C) dry and warm (D) dry and cool

Ex Output:
A

Ex Input:
An earthworm was placed on top of a thick layer of moist topsoil in a pan. The pan was placed in a room with the lights on. How did the earthworm most likely respond to these conditions?
(A) by burrowing under the soil (B) by crawling around in the pan (C) by staying where it was placed (D) by trying to crawl out of the pan

Ex Output:
A