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:
Which would most likely be the characteristic of an object with a small volume and large mass?  
 (A) high density (B) low pressure (C) low viscosity (D) high temperature

Ex Output:
A


Ex Input:
In what type of rock would a geologist most likely find evidence of ancient life?  
 (A) sedimentary (B) foliated (C) metamorphic (D) volcanic

Ex Output:
A


Ex Input:
What is the best way for a marine scientist to determine the eating habits of sharks?  
 (A) Tag one shark and monitor its eating habits for one day. (B) Tag one shark and monitor its eating habits for one year. (C) Tag several sharks and monitor their eating habits for one day. (D) Tag several sharks and monitor their eating habits for one year.

Ex Output:

D