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: Some experts believe whining peaks around the ages of ____ or four.\Question: Choose the right answer from options given a) three b) no c) four d) seven
Example Output: a

Example Input: Pods contain less than ____ animals, mainly females with calves and sexually immature males.\Question: Choose the right answer from options given a) zero b) six c) no d) ten
Example Output: d

Example Input: Canaries Give the names of ____ varieties of canaries.\Question: Choose the right answer from options given a) four b) three c) nine d) eight
Example Output:
a