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:
What type of galaxy is the Milky Way?  
 (A) spiral (B) elliptical (C) irregular (D) oval

Ex Output:
A


Ex Input:
What is the downward movement of water through pores and other spaces in soil due to the force of gravity?  
 (A) percolation (B) evaporation (C) precipitation (D) condensation

Ex Output:
A


Ex Input:
Which of the following is the primary advantage of sexual reproduction when compared to asexual reproduction?  
 (A) There is a greater number of offspring. (B) There is more food available to offspring. (C) There is greater genetic variety in offspring. (D) There is a longer development time for offspring.

Ex Output:

C