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:
The Piedmont and Coastal Plains regions in Maryland produce crops such as corn, soybeans, wheat, tobacco, tomatoes, and apples. Which environmental factor most likely influences which crops are grown in these regions?  
 (A) soil quality (B) wind speeds (C) bird migration (D) water temperature

Ex Output:
A


Ex Input:
What tool would be used to examine a fingerprint?  
 (A) a graduated cylinder (B) a hand lens (C) a pair of goggles (D) a thermometer

Ex Output:
B


Ex Input:
Which energy transformation occurs during active transport in a cell?  
 (A) light energy -> chemical energy (B) kinetic energy -> potential energy (C) chemical energy -> mechanical energy (D) mechanical energy -> electrical energy

Ex Output:

C