Great Outdoors, a Manufacturer of Camping Equipment, Sells Several Lines

Great Outdoors, a manufacturer of camping equipment, sells several lines of tents that are very similar to each other. The company does not want one line of its tents to steal market share from another line of its tents. To protect against this, it must be concerned with

A) creating differences between the lines of tents, based on tangible, real differences.
B) making sure advertising for one line of tents does not appear in the same medium as advertising for another line.
C) primary demand stimulation.
D) effective internal positioning.