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]: Ground squirrels breed once a year, averaging ____ to eight per litter.\Question: Choose the right answer from options given a) seven b) one c) six d) ten
[A]: a


[Q]: Circumcisions usually heal within ____ to two weeks.\Question: Choose the right answer from options given a) one b) five c) eight d) nine
[A]: a


[Q]: Bone loss starts as soon as ____ months from loss of menstruation.\Question: Choose the right answer from options given a) no b) nine c) ten d) six
[A]:
d