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

[EX Q]: Sierra County has _ different regions.
[EX A]: two

[EX Q]: Some people have _ or four careers during their lives.
[EX A]: three

[EX Q]: Placental abruption is _ times more likely to occur in a multiples pregnancy.
[EX A]:
three