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:
which form of transportation has zero emissions? (A) motorbikes (B) speed boats (C) hybrid cars (D) pedal bikes
answer:
D


question:
A deer, shark, human and rose share which common activity? (A) eating cheese (B) marrying (C) defecating (D) building ships
answer:
C


question:
What does the digestive system break down into simple substances? (A) metals (B) stones (C) plastic food (D) nutriment
answer:

D