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: Joann repeatedly overfed the fish in the pond behind her house. The nitrates from the excess food contributed to an overgrowth of algae. To correct the problem, Joann added more plants to the pond. How will adding more plants help?
(A) The plants make the pond look beautiful. (B) The plants will camouflage the green algae. (C) The plants will compete with algae for nutrients. (D) The plants will provide all the food for the fish.

SOLUTION: C

PROBLEM: During which stage of an insect's life cycle does the female lay eggs?
(A) nymph (B) larva (C) pupa (D) adult

SOLUTION: D

PROBLEM: A line graph is best used when the measured variable is
(A) changing at a constant rate. (B) nearly equal in several trials. (C) being compared to a control. (D) observed at one point in time.

SOLUTION:
A