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: Some taxonomists classify only ____ species though.\Question: Choose the right answer from options given a) one b) six c) two d) three
Example Output: c

Example Input: Surficial deposits range in thickness from ____ to several hundred feet.\Question: Choose the right answer from options given a) eight b) four c) two d) zero
Example Output:
d