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

Example Input: Mothers usually give birth to one, two, or ____ babies at a time.\Question: Choose the right answer from options given a) three b) zero c) five d) ten
Example Output: a

Example Input: Most carnivores can have children after one or ____ years.\Question: Choose the right answer from options given a) six b) two c) no d) four
Example Output:
b