A new variety of Lays is initially introduced in Phoenix, Arizona; Cleveland, Ohio; Battle Creek, Michigan; and Peoria, Illinois. After its initial success, Frito-Lay markets the new Lays in those entire states, then the adjacent states, and finally the entire country. Frito-Lay is using a _____ for its new variety of Lays.
A. Multistage introduction
B. Rollout approach
C. Test market expansion
D. Mass commercialization
E. Trickle-down approach
