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 ____ noses.\Question: Choose the right answer from options given a) zero b) eight c) five d) three
[EX A]: c

[EX Q]: Smoking is responsible for one out of ____ American deaths.\Question: Choose the right answer from options given a) five b) six c) nine d) seven
[EX A]: a

[EX Q]: Absolute pressure is referenced against absolute ____ pressure, or a complete vacuum.\Question: Choose the right answer from options given a) one b) three c) ten d) zero
[EX A]:
d