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:
Today there are ____ federal states, each based on cultural affiliations.\Question: Choose the right answer from options given a) one b) nine c) seven d) zero

Ex Output:
b


Ex Input:
Hybridization is the practice of ____ different species interbreeding.\Question: Choose the right answer from options given a) no b) one c) two d) three

Ex Output:
c


Ex Input:
Most spiders have eight eyes, but the brown recluse has ____ eyes arranged in a distinctive pattern.\Question: Choose the right answer from options given a) two b) zero c) six d) seven

Ex Output:

c