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

[EX Q]: Bacteriophage lambda has _ different life cycles.
[EX A]: two

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

[EX Q]: Most scotch whiskey has about _ times more congeners than does gin.
[EX A]:
four