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:
Two identical books are on opposite ends of a table. Which of these would increase the gravitational force exerted between the two books?
(A) decrease the distance between the books (B) decrease the mass of the books (C) decrease the mass of the table (D) decrease the temperature in the room

Ex Output:
A

Ex Input:
Which property of water allows it to dissolve many different substances?
(A) It is a polar molecule. (B) It contains hydrogen atoms. (C) It has a high melting point. (D) It has a low density.

Ex Output:
A