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: Ants have ____ noses.\Question: Choose the right answer from options given a) zero b) eight c) five d) three
Example Output: c

Example Input: Elk retain their antlers for more than ____ months of the year.\Question: Choose the right answer from options given a) nine b) ten c) six d) seven
Example Output: c

Example Input: Ornamental grasses can offer a special textural element which persevere through ____ seasons.\Question: Choose the right answer from options given a) seven b) four c) three d) no
Example Output:
b