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.

[Q]: One important use of coal is to produce energy for homes. Coal can be burned and converted to  
 (A) wind energy. (B) nuclear energy. (C) electrical energy. (D) solar energy.
[A]: C


[Q]: 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
[A]: D


[Q]: When placed in a glucose solution, yeast cells will produce bubbles. Which process are the yeast cells carrying out?   
 (A) chemosynthesis (B) photosynthesis (C) respiration (D) transpiration
[A]:
C