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').

Q: 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

A: b
****
Q: Woodchucks produce about ____ young and virtually all females breed annually.\Question: Choose the right answer from options given a) ten b) four c) no d) six

A: b
****
Q: Crustaceans have complicated life cycles sometimes involving ____ separate metamorphoses.\Question: Choose the right answer from options given a) zero b) four c) three d) six

A:
b
****