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 of these is a nonliving part of a forest?  
 (A) Tree (B) Soil (C) Worm (D) Mushroom
[A]: B


[Q]: A meteoroid becomes a meteorite when it  
 (A) impacts the surface of a planet. (B) encounters the atmosphere of a planet. (C) makes a complete orbit around a planet. (D) starts to burn up in the atmosphere of a planet.
[A]: A


[Q]: A researcher's plan is to place five fish in separate tanks, give them the same amount of food each day, and keep the temperature the same. One fish will be exposed to artificial light for 24 hours each day, while the others will have light for 22 hours and then no light for 2 hours each day. Which is the control for this experiment?  
 (A) the separate tanks (B) the amount of food (C) the fish deprived of light (D) the fish exposed to light for 24 hours
[A]:
D