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

[EX Q]: Violence has _ boundaries and effects every person no matter one's race or religion.
[EX A]: no

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

[EX Q]: Female manatees begin reproducing at about _ years of age.
[EX A]:
four