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]: Some programming languages have ____ or more standards.\Question: Choose the right answer from options given a) no b) seven c) two d) three
[EX A]: c

[EX Q]: ATMs are expensive machines with an average useful life of ____ to fifteen years.\Question: Choose the right answer from options given a) nine b) eight c) ten d) two
[EX A]: c

[EX Q]: Vitamin E is really ____ different compounds.\Question: Choose the right answer from options given a) nine b) two c) ten d) eight
[EX A]:
d