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: Taste is comprised of ____ primary senses detected on the palate.\Question: Choose the right answer from options given a) two b) seven c) five d) ten
Example Output: c

Example Input: Black people are four to ____ times more likely to be stopped and searched.\Question: Choose the right answer from options given a) three b) five c) one d) four
Example Output: b

Example Input: Most male walruses are sexually mature at about ____ to ten years.\Question: Choose the right answer from options given a) eight b) one c) six d) two
Example Output:
a