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]: 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]: Today there are ____ basic classifications of sausage.\Question: Choose the right answer from options given a) five b) four c) six d) one
[EX A]: a

[EX Q]: Baseball has streaks and teams play three or ____ games in a row, on consecutive days.\Question: Choose the right answer from options given a) six b) three c) ten d) four
[EX A]:
d