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]: Which could be a possible way to prevent wildlife species from becoming endangered?  
 (A) drinking less water (B) establishing more habitats (C) cutting down more forests (D) stopping underground coal mining
[A]: B


[Q]: After a star runs out of most of its hydrogen fuel, it becomes hotter and more luminous. What stage does this represent in the life cycle of a star?  
 (A) quasar (B) protostar (C) red giant (D) white dwarf
[A]: C


[Q]: Computers have devices called heat sinks designed to lower the temperature of a computer by scattering produced heat into the surrounding area. Which type of energy is kept away from a computer by a heat sink?  
 (A) electrical (B) chemical (C) thermal (D) nuclear
[A]:
C