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.

[Q]: A student is asked to bring something that feels rough to class. Which would be BEST for him to bring?
(A) Pillow (B) Marble (C) Sandpaper (D) Trading card
[A]: C

[Q]: All of the following can become fossils except
(A) bones. (B) shells. (C) teeth. (D) rocks.
[A]: D

[Q]: A green plant absorbs light. A frog eats flies. These are both examples of how organisms
(A) obtain energy (B) escape predators (C) produce offspring (D) excrete waste
[A]:
A