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

[EX Q]: Cichlids are popular in the aquarium hobby for a _ reason.
[EX A]: four

[EX Q]: Uncontrolled diabetes can increase risk by up to _ times.
[EX A]: four

[EX Q]: Plant shrubs _ to four feet apart in rows six feet apart.
[EX A]:
three