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]: Ants have ____ stomachs.\Question: Choose the right answer from options given a) two b) nine c) four d) seven
[A]: a


[Q]: Gasoline is ____ times as expensive as in the United States.\Question: Choose the right answer from options given a) two b) four c) three d) ten
[A]: c


[Q]: Multidisciplinary planning is the interweaving of two or ____ disciplines.\Question: Choose the right answer from options given a) nine b) three c) six d) zero
[A]:
b