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 situation is the best example of an inherited trait?
(A) a boy playing with a ball (B) a bird building a nest (C) a horse pulling a wagon (D) a dog sitting on command
[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]: If you bounce a rubber ball on the floor, it goes up and then comes down. What causes the ball to come down?
(A) magnetism (B) gravity (C) electricity (D) friction
[A]:
B