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

Example Input: Animals get energy for growth and repair from  
 (A) soil (B) food (C) water (D) air
Example Output: B

Example Input: Trevor turns on a lamp. When the lamp is on, electrical energy changes into which other form of energy?  
 (A) chemical (B) light (C) mechanical (D) potential
Example Output:
B