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]: Most ovarian cysts go away on their own in ____ to three months without causing any problems.\Question: Choose the right answer from options given a) one b) ten c) five d) eight
[A]: a

[Q]: Female cats have ____ X's in each cell.\Question: Choose the right answer from options given a) five b) two c) one d) ten
[A]: b

[Q]: Spiny mice are mature at the age of ____ weeks and they are fully grown at one hundred fifty days.\Question: Choose the right answer from options given a) no b) six c) two d) seven
[A]:
d