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.

Input: Consider Input: What is the main function of red blood cells?  
 (A) To fight disease in the body (B) To carry oxygen to all parts of the body (C) To remove carbon monoxide from all parts of the body (D) To produce materials which cause the blood to clot.

Output: B


Input: Consider Input: Which of these senses lets Dora know when a skunk has been close to her house?  
 (A) Taste (B) Touch (C) Smell (D) Hearing

Output: C


Input: Consider Input: Cells that conduct messages are known as  
 (A) skin cells (B) nerve cells (C) blood cells (D) kidney cells


Output: B