Teacher: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.
Teacher: Now, understand the problem? Solve this instance: The compression of matter due to gravitational attraction increased as the protoplanets formed. What was a result of this compression within each protoplanet?
(A) initiation of nuclear fusion (B) increase in noble gas destabilization (C) increase in thermal energy (D) initiation of photosynthesis reactions
Student:
C