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 ____ major breweries in Mexico that produce a spectrum of tasty beverages.\Question: Choose the right answer from options given a) nine b) six c) zero d) eight

Ex Output:
b


Ex Input:
Gases are perhaps the best understood of the ____ states of matter.\Question: Choose the right answer from options given a) three b) five c) nine d) zero

Ex Output:
a


Ex Input:
Insects have ____ antennae.\Question: Choose the right answer from options given a) two b) five c) ten d) nine

Ex Output:

a