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]: Teething begins for most babies around ____ to six months.\Question: Choose the right answer from options given a) three b) four c) five d) seven
[A]: b


[Q]: Alcoholics are nearly ____ times more likely than others to die in motor vehicle crashes.\Question: Choose the right answer from options given a) ten b) eight c) six d) five
[A]: d


[Q]: Seismologists offer ____ major theories for the occurrence of large, deep earthquakes.\Question: Choose the right answer from options given a) six b) three c) four d) ten
[A]:
b