In this task, find the most appropriate number to replace the blank (indicated with _ ) and express it in words.

[Q]: Female cats can go into heat for the first time as early as _ months of age.
[A]: five


[Q]: Every drug has _ names, a chemical name, a brand name, and an official name.
[A]: three


[Q]: Medical abortions require _ doctors' visits, driving up the cost.
[A]:
three