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:
A full moon is caused by (A) werewolves (B) moonlight (C) tides (D) orbiting
answer:
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:
Undifferentiated cells in plants allow it to grow (A) in clouds (B) taller (C) without sunlight (D) without water
answer:

B