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:
Which is the most important safety measure to follow when using an acid in a classroom laboratory?  
 (A) wearing protective clothing and goggles (B) keeping the window open (C) closing the door to the hall (D) using bright fluorescent lights

Ex Output:
A


Ex Input:
Over geologic time, global mean sea level has varied significantly. Which change is most likely responsible for an increase in global mean sea level?  
 (A) erosion of sediment from a mountain range (B) mass extinction of marine organisms (C) formation of an ocean trench (D) melting of polar ice caps

Ex Output:

D