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').

Example Input: Eastern cottontails have ____ different fur coats each year.\Question: Choose the right answer from options given a) five b) two c) eight d) six
Example Output: b

Example Input: Corms are undifferentiated, uniform, and contain ____ rings when cut apart.\Question: Choose the right answer from options given a) no b) three c) one d) zero
Example Output: a

Example Input: Human error destroys ____ times more data than viruses.\Question: Choose the right answer from options given a) five b) ten c) seven d) three
Example Output:
a