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: As Earth revolves around the Sun, the number of daylight hours varies from place to place. In which location would the number of daylight hours remain constant?  
 (A) North Pole (B) Prime Meridian (C) Equator (D) Antarctica
Example Output: C

Example Input: Typically, sedimentary rocks are formed  
 (A) only in erupting volcanoes. (B) only under great pressure and high temperatures. (C) below Earth's surface as magma cools and crystallizes. (D) from materials that settle.
Example Output: D

Example Input: Mrs. Garry's class wants to know if their area has more acid rain than other parts of the state. Which would be the best way for them to begin research?  
 (A) contact other schools within the state (B) study science textbooks in the library (C) look for current acid rain studies on the Internet (D) examine soil samples taken at different locations
Example Output:
C