TASK DEFINITION: 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.
PROBLEM: The greatest amount of diversity can be found among which type of organism?  
 (A) plants (B) animals (C) bacteria (D) fungi

SOLUTION: C

PROBLEM: When oxygen combines with hydrogen, which substance is formed?  
 (A) water (B) vinegar (C) hydrochloric acid (D) hydrogen dioxide

SOLUTION: A

PROBLEM: Students are using hammers to break apart rocks as part of an investigation. The students MUST wear goggles to  
 (A) magnify the work. (B) keep hair out of their faces. (C) protect their eyes from debris. (D) prevent glare from the light.

SOLUTION:
C