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]: Where do good bacteria grow to help keep people healthy?  
 (A) in the brain (B) in the blood (C) on the skin (D) on the bones
[A]: C


[Q]: If a student gets a chemical splashed into an eye, what is the most appropriate first action to be taken?  
 (A) wipe it with a paper towel (B) call 911 for emergency services (C) have someone go get the school nurse (D) flush the eye with water at an eyewash station
[A]: D


[Q]: Which of these were formed by glaciers that flowed through the Ruby Mountain region in northeastern Nevada?  
 (A) lakes (B) deserts (C) volcanic necks (D) V-shaped valleys
[A]:
A