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 Q]: When would the highest tides occur along the Texas coast?  
 (A) at sunrise (B) at sunset (C) during a full moon (D) during a half moon
[EX A]: C

[EX Q]: Calcium carbonate (CaCO_{3}) is considered a compound because it is made up of two or more  
 (A) molecules. (B) elements. (C) gases. (D) solids.
[EX A]: B

[EX Q]: Solar radiation has a part in the water cycle by  
 (A) affecting ocean tides. (B) helping in the absorption of groundwater. (C) determining the type of clouds formed. (D) changing water to a vapor.
[EX A]:
D