In the Context of Territory Routing Plans, the Leapfrog Routing

In the context of territory routing plans, the leapfrog routing plan is best applied when:

A) accounts are evenly dispersed throughout the territory.
B) accounts are clustered into several widely dispersed groups.
C) accounts are located in linear clusters that are some distance from one another.
D) accounts are held in major metropolitan areas.
E) accounts are highly concentrated with locations controlled by a grid of city blocks.