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: Scientists divide bats into ____ groups.\Question: Choose the right answer from options given a) five b) two c) one d) zero
Example Output: b

Example Input: Alcoholics are nearly ____ times more likely than others to die in motor vehicle crashes.\Question: Choose the right answer from options given a) ten b) eight c) six d) five
Example Output: d

Example Input: Diversification means having money in all ____ types.\Question: Choose the right answer from options given a) four b) two c) three d) seven
Example Output:
c