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').

[EX Q]: Turkish citizens can enter Bosnia and stay up to ____ months without a visa.\Question: Choose the right answer from options given a) five b) seven c) four d) three
[EX A]: d

[EX Q]: Ants have six legs, and each leg has ____ joints.\Question: Choose the right answer from options given a) nine b) zero c) two d) three
[EX A]: d

[EX Q]: Bears have only about ____ months to build up fat reserves for their long winter hibernation.\Question: Choose the right answer from options given a) no b) six c) nine d) zero
[EX A]:
b