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]: Gestation lasts ____ months, with the birth of a single calf.\Question: Choose the right answer from options given a) three b) one c) six d) eight
[EX A]: d

[EX Q]: Some families have two daddies or ____ mommies.\Question: Choose the right answer from options given a) nine b) seven c) zero d) two
[EX A]: d

[EX Q]: Cubs eat meat from their sixth week and they remain weaned ____ to eight months.\Question: Choose the right answer from options given a) one b) six c) four d) ten
[EX A]:
b