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:
A student wants to organize a group of animals into two categories based on observable external features. Which display will most appropriately show the two categories of animals?     
 (A) a timeline (B) a pie chart (C) a data table (D) a line graph

Ex Output:
C


Ex Input:
The relationship between ticks and a dog can best be described as  
 (A) mutualism. (B) competition. (C) parasitism. (D) commensalism.

Ex Output:
C


Ex Input:
Which enzyme acts first in response to the ingestion of a hamburger patty?  
 (A) amylase in the mouth (B) pepsin in the stomach (C) lipase in the small intestine (D) trypsin in the small intestine

Ex Output:

B