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]: Compared to Earth, the Moon is
(A) drier. (B) larger. (C) heavier. (D) brighter.
[A]: A

[Q]: A hearing aid is a small device that contains an amplifier, a battery, a microphone, and a speaker. Which part of a hearing aid functions to detect sounds in the user's environment?
(A) the amplifier (B) the battery (C) the microphone (D) the speaker
[A]: C

[Q]: In humans, a V-shaped hairline is dominant over a straight hairline. If one parent is homozygous for a V-shaped hairline ( HH ) while the other parent is homozygous for a straight hairline ( hh ), what is the probability that the offspring of these parents will have a straight hairline?
(A) 0% (B) 50% (C) 75% (D) 100%
[A]:
A