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: Most marine sediments are of ____ basic types.\Question: Choose the right answer from options given a) three b) ten c) two d) nine
Example Output: c

Example 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
Example Output: b

Example Input: Accountability is a ____ way street.\Question: Choose the right answer from options given a) six b) two c) seven d) five
Example Output:
b