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: Golden jackals live eight to ____ years in the wild and up to sixteen in captivity.\Question: Choose the right answer from options given a) no b) zero c) ten d) nine
Example Output: d

Example Input: Any solid angle is contained by plane angles whose sum is less than ____ right angles.\Question: Choose the right answer from options given a) seven b) ten c) four d) nine
Example Output:
c