The channel strategy demonstrated that when Black & Decker sells its tools in the consumer market under the Black & Decker name and basically the same tools to the business market using the Dewalt brand name. Black & Decker is using $\_\_\_\_\_\_\_\_\_.$

a$.$

strategic channel alliance

b$.$

vertical integration

c$.$

multi$-$product distribution

d$.$

dual distribution

e$.$

cooperative distribution