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').

Ex Input:
Conflict occurs between when ____ people have a car accident.\Question: Choose the right answer from options given a) no b) eight c) two d) nine

Ex Output:
c


Ex 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

Ex Output:
c


Ex Input:
Reproductive maturity occurs at seven to ____ years.\Question: Choose the right answer from options given a) nine b) zero c) eight d) ten

Ex Output:

d