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: Couples often date from one to ____ years before getting engaged.\Question: Choose the right answer from options given a) three b) nine c) eight d) seven

A: a
****
Q: Many people have ____ symptoms until they suffer chest pains or a heart attack.\Question: Choose the right answer from options given a) three b) one c) no d) seven

A: c
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Q: Smoking causes ulcers by at least ____ mechanisms.\Question: Choose the right answer from options given a) two b) no c) three d) five

A:
c
****