instruction:
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").
question:
Humans contribute to environmental pollution (A) by purchasing products made from recycled products (B) by switching to energy efficient appliances (C) by leaving behind refuse on public beaches (D) by frequently recycling paper and plastic
answer:
C


question:
Locusts historically always affect crops (A) in the sky (B) disadvantageously (C) near water (D) positively
answer:
B


question:
If you breathe out, especially in the vicinity of clear glass, you may witness (A) your breath is air (B) your breath is dry (C) your breath beading up (D) your breath smells bad
answer:

C