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: Brachiopods are superficially similar to bivalves, both having ____ shells.\Question: Choose the right answer from options given a) two b) eight c) seven d) one

A: a
****
Q: Chinese cuisine has ____ tolerance for animal rights groups.\Question: Choose the right answer from options given a) ten b) zero c) four d) no

A: b
****
Q: Cankers develop slowly and can take ____ months to girdle a stem.\Question: Choose the right answer from options given a) four b) seven c) one d) eight

A:
a
****