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]: A student conducts an investigation using mold spores. In one part of the investigation, he needs to closely examine a spore sample. Which piece of equipment does the student need to use to keep mold spores from entering his respiratory system?
(A) breathing mask (B) safety goggles (C) rubber gloves (D) lead smock
[A]: A

[Q]: Which of these shows the correct order for the central dogma of molecular biology?
(A) DNA to protein to RNA (B) RNA to DNA to protein (C) protein to DNA to RNA (D) DNA to RNA to protein
[A]: D

[Q]: What type of precipitation occurs when raindrops freeze as they fall?
(A) hail (B) frost (C) sleet (D) snow
[A]:
C