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]: Young squirrels remain in the nest for about ____ weeks.\Question: Choose the right answer from options given a) seven b) six c) two d) eight
[EX A]: b

[EX Q]: Pupae usually transform into adults ____ to three days later.\Question: Choose the right answer from options given a) one b) two c) no d) eight
[EX A]: b

[EX Q]: Groundhogs usually have ____ separate dens.\Question: Choose the right answer from options given a) two b) nine c) eight d) four
[EX A]:
a