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: Frame construction predominates in the New England area due to the abundance of  
 (A) clay. (B) masonry. (C) wood. (D) steel.

Output: C


Input: Consider Input: Electron transport in mitochondria results in a chemiosmotic gradient of which particle across the mitochondrial membrane?  
 (A) ADP (B) ATP (C) protons (D) neutrons

Output: C


Input: Consider Input: Which of the following observations best supports the conclusion that two animal species evolved from a common ancestor in recent geological history?  
 (A) The species are both herbivores. (B) The species have similar bone structure. (C) The species live in the same environment. (D) The species both obtain oxygen from the air.


Output: B