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
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Q: Which process does the slate that comes from shale come from? (A) height (B) compression (C) gravity (D) steel

A: B
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Q: If a habitat that supports itself is flourishing, improvements may still be made by (A) burying small oak pips (B) using pesticides fairly regularly (C) setting uncontrolled wild fires (D) setting out mouse traps

A:
A
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