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: Digestion is when stomach acid breaks down what? (A) food essays (B) sustenance (C) water (D) air

A: B
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Q: Which of the following is correct? (A) The earth's strong gravitational pull causes a waxing gibbous to form (B) astrology causes a waxing gibbous to form (C) star maps cause a waxing gibbous to form (D) government satellites cause a waxing gibbous to form

A: A
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Q: Which of these could add unwanted contamination to the natural environment? (A) making compost (B) hoarding trash (C) eating fruit (D) burning liquid petroleum

A:
D
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