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').

Input: Consider Input: Calves can swim ____ days after they are born.\Question: Choose the right answer from options given a) ten b) two c) zero d) one

Output: b


Input: Consider Input: Poodles have ____ legs.\Question: Choose the right answer from options given a) one b) four c) six d) nine

Output: b


Input: Consider 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


Output: a