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]: Fluorescent lamps are roughly ____ times more intense than ordinary lightbulbs.\Question: Choose the right answer from options given a) six b) one c) three d) eight
[A]: c

[Q]: Hamsters can live to be three to ____ years old.\Question: Choose the right answer from options given a) four b) two c) three d) nine
[A]: a

[Q]: Eldorado Canyon is located about ____ miles southeast of Dayton, Nevada in the Pine Nut Mountains.\Question: Choose the right answer from options given a) zero b) three c) ten d) one
[A]:
b