instruction:
Given a sentence with a missing word, pick the answer option that best fills out the missing word in the sentence. Indicate each answer with its index ('a', 'b', 'c', 'd').
question:
Cats have ____ sets of vocal cords.\Question: Choose the right answer from options given a) zero b) nine c) two d) three
answer:
c


question:
Potential energy is divided into ____ different types of energy.\Question: Choose the right answer from options given a) eight b) three c) zero d) two
answer:
b


question:
Ostrichs only have ____ toes, and one toenail.\Question: Choose the right answer from options given a) two b) ten c) six d) nine
answer:

a