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

[EX Q]: Bull sharks are a 'requiem' species, reaching up to _ feet in length.
[EX A]: ten

[EX Q]: Interstate commerce is commerce conducted in at least _ states.
[EX A]: two

[EX Q]: Ovarian tumors have _ stages.
[EX A]:
four