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: Prairie dogs bear four or ____ young per litter.\Question: Choose the right answer from options given a) five b) eight c) two d) zero
Example Output: a

Example Input: Chimeras are ____ headed creatures that shoot fire from all three heads, damaging a wide area.\Question: Choose the right answer from options given a) three b) one c) eight d) six
Example Output: a

Example Input: Squirrels have four sharp claws on their front feet and ____ on the rear.\Question: Choose the right answer from options given a) no b) nine c) five d) three
Example Output:
c