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: Which group of organisms can make food by a process called chemosynthesis?
(A) scavengers (B) producers (C) consumers (D) decomposers
Example Output: B

Example Input: Similar types of cells form tissues. What is the next level of complexity formed from the grouping of tissues?
(A) organs (B) organelles (C) organisms (D) organ systems
Example Output: A

Example Input: A fever is a response to a disease-causing agent infecting the body. Raising one's body temperature changes the shape of enzymes in the agent so it cannot reproduce. Which statement best describes a fever?
(A) A fever is an internal response to an external stimulus. (B) A fever is an internal response to an internal stimulus. (C) A fever is an external response to an external stimulus. (D) A fever is an external response to an internal stimulus.
Example Output:
B