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: During which season of the year would a rabbit's fur be thickest?  
 (A) fall (B) spring (C) summer (D) winter

A: D
****
Q: In 1971, the bones of an extinct flying dinosaur were discovered. This kind of discovery helps everyone learn more about  
 (A) impact of humans on Earth. (B) effect of gravity on animals. (C) history of animal species on Earth. (D) likelihood that dinosaurs will reappear.

A: C
****
Q: When rock particles settle at the bottom of the ocean, they can continue to be buried by other particles. The process of cementation of these particles forms  
 (A) molten rocks. (B) igneous rocks. (C) sedimentary rocks. (D) metamorphic rocks.

A:
C
****