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 excessive use of nitrogen-based fertilizers causes runoff that increases the nitrogen content of lakes and bays. These nitrogen compounds directly affect the aquatic ecosystems by
(A) interfering with the water cycle. (B) decreasing the predator population. (C) increasing the rate of algae growth. (D) causing aquatic animals to grow larger.

SOLUTION: C

PROBLEM: Which of these properties of water helps moderate the weather of coastal areas?
(A) neutral pH (B) high specific heat (C) dissolves many substances (D) floats as a solid

SOLUTION: B

PROBLEM: A student finds a bottle that is labeled with a long chemical name. What is the best way for the student to learn more about the chemical properties of this substance?
(A) shake the container vigorously (B) smell a very small amount of it (C) look up the name in a science book (D) test a small amount to see if it feels slippery

SOLUTION:
C