You are given a science question (hard-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: The visible colors listed from shortest to longest wavelength are violet, blue, green, yellow, orange, and red. Which of the following accurately compares the frequency of these colors using this information?  
 (A) Blue has a higher frequency than violet. (B) Blue has a higher frequency than green. (C) Orange has a lower frequency than red. (D) Violet has a lower frequency than yellow.
Example Output: B

Example Input: Which of the following is the farthest from Earth?  
 (A) Halley's comet (B) the Andromeda galaxy (C) Neptune (D) the Sun
Example Output: B

Example Input: Which statement is true about the solar system?  
 (A) The gas planets are closer to the Sun. (B) The solid planets are closer to the Sun. (C) The planets are arranged in order of increasing size. (D) The solid planets are much larger than the gas planets.
Example Output:
B