In this task, you are given a multiple-choice question and you have to pick the correct option. Answer with option indexes (i.e., "A", "B", "C", and "D").

[Q]: Which of the following is never an element used to make carbohydrates for the plant? (A) sand (B) water (C) sunlight (D) carbon dioxide
[A]: A

[Q]: Pulse accelerates (A) when cooling down after a work out (B) when running pace increases (C) when running pace slows (D) when entering into a sleep state
[A]: B

[Q]: What is an example of friction occurring? (A) there is more resistance driving on gravel than on concrete (B) a person thinks a thought (C) an apple falls to the ground from a tree (D) a spring bounces back and forth
[A]:
A