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]: Most endocrinologists see patients every ____ months throughout the pregnancy.\Question: Choose the right answer from options given a) six b) two c) zero d) three
[A]: b


[Q]: Cancer is the second leading cause of death in Georgia, accounting for one in ____ deaths each year.\Question: Choose the right answer from options given a) nine b) zero c) five d) four
[A]: d


[Q]: Most apartment buildings have at least ____ exit stairways.\Question: Choose the right answer from options given a) three b) six c) two d) no
[A]:
c