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: Compared to Earth, the Moon is  
 (A) drier. (B) larger. (C) heavier. (D) brighter.
Example Output: A

Example Input: The phases of the Moon are daily changes in the appearance of the Moon. One reason Moon phases occur is because the Moon reflects sunlight. Which is another reason that the phases of the Moon occur?  
 (A) Earth is tilted on the axis. (B) The Moon rises and sets. (C) The Moon orbits Earth. (D) Earth orbits the Sun.
Example Output: C

Example Input: On a field trip in a wooded area, you see a small, strange object. You wonder whether is is a live animal. The best way to find out is to observe the object to see if it  
 (A) has an odor. (B) has separate parts. (C) can make a noise and has a lifelike color. (D) carries out basic life functions.
Example Output:
D