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.

Ex Input:
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

Ex Output:
D

Ex Input:
Which is a trait that a child can inherit from its parents?
(A) eye color (B) a broken leg (C) length of hair (D) language skills

Ex Output:
A

Ex Input:
The chemical equation below shows a reaction of copper (Cu) with silver nitrate (AgNO_{3}) yielding silver (Ag) and copper(II) nitrate (Cu(NO_{3})_{2}) Cu + 2AgNO_{3} -> 2Ag + Cu(NO_{3})_{2} Silver and copper(II) nitrate are called the
(A) reactants. (B) products. (C) catalysts. (D) inhibitors.

Ex Output:
B