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

Example Input: Acute sinusitis is any infectious process in the sinus lasting from one day to ____ weeks.\Question: Choose the right answer from options given a) five b) seven c) one d) three
Example Output:
d