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: In order to maintain good health, humans should
(A) eat foods high in fat (B) exercise regularly (C) drink alcohol often (D) smoke tobacco occasionally

SOLUTION: B

PROBLEM: Which is a major difference between the life cycles of different types of plants?
(A) the way they die (B) the energy they use (C) the way they reproduce (D) the way they make food

SOLUTION: C

PROBLEM: A sample of the element copper is divided into the smallest particles possible such that each particle is still copper. Each particle can best be described as
(A) an atom. (B) a molecule. (C) a nucleus. (D) an electron.

SOLUTION:
A