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

Ex Output:
C


Ex Input:
Why would animals most likely have to leave an area during a drought?  
 (A) to find mates (B) to find shelter (C) to escape predators (D) to find water and food

Ex Output:
D


Ex Input:
In a cell, a newly synthesized protein requires modification by the addition of a carbohydrate. Which structure will transport the protein from the site of synthesis to the site of modification?  
 (A) a ribosome (B) the endoplasmic reticulum (C) the Golgi apparatus (D) a vacuole

Ex Output:

B