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

[EX Q]: Many prosimians have at least _ nipples and produce litters rather than a single offspring.
[EX A]: four

[EX Q]: Plants are _ feet apart with ten feet between rows.
[EX A]: four

[EX Q]: Mule deer have a gestation period of about _ months.
[EX A]:
seven