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: Peonies grow from two to ____ feet in height.\Question: Choose the right answer from options given a) five b) zero c) three d) four

Output: d


Input: Consider Input: Wolverines reproduce every ____ or three years.\Question: Choose the right answer from options given a) two b) three c) one d) four

Output: a


Input: Consider Input: Echinoderms have radial symmetry , many having five or multiples of ____ arms.\Question: Choose the right answer from options given a) three b) zero c) one d) five


Output: d