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]: Beavers live in families that include an adult pair and ____ to three years worth of offspring.\Question: Choose the right answer from options given a) no b) one c) four d) ten
[A]: b


[Q]: Natural indium contains ____ isotopes.\Question: Choose the right answer from options given a) one b) eight c) two d) seven
[A]: c


[Q]: Sleep paralysis is rare, probably ____ times in the last couple of years.\Question: Choose the right answer from options given a) eight b) no c) two d) four
[A]:
d