You are tasked with selecting a preferred supplier from two candidates $($A and B$).$ Based on historical data, both have an average replenishment time of $30$ days; however, Supplier A has a replenishment time standard deviation of $1$ day, and Supplier B has a replenishment time standard deviation of $2$ days. Which supplier should you select? Why?

Supplier A because its replenishment time has less variability.

Supplier B because its replenishment time has less variability.

Either because they have the same replenishment time variability.