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: Ankle joint has ____ degrees of freedom.\Question: Choose the right answer from options given a) seven b) eight c) four d) three

Output: d


Input: Consider Input: Pandas reach adulthood at about ____ years of age.\Question: Choose the right answer from options given a) eight b) seven c) five d) six

Output: c


Input: Consider Input: Rats live to around ____ years of age.\Question: Choose the right answer from options given a) six b) ten c) zero d) two


Output: d