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.
--------
Question: Which of the following is the main role of flowers found on most flowering plants?
(A) to take in air (B) to produce seeds (C) to absorb nutrients (D) to protect the stem

Answer: B

Question: Alex looked at an electric toothbrush that had a plug with three metal prongs. Why are these prongs made out of metal?
(A) Metal doesn't get hot and melt when you plug it into the outlet. (B) Metal is strong and is less likely to break when you plug it into the outlet. (C) Metal is an insulator and prevents shocks when you plug it into the outlet. (D) Metal is a conductor and completes a circuit when you plug it into the outlet.

Answer: D

Question: The range of all forms of radiant energy is called the
(A) video spectrum. (B) audio spectrum. (C) color spectrum. (D) electromagnetic spectrum.

Answer:
D