To Prevent the Generic Use of a Brand Name, a Company

To prevent the generic use of a brand name, a company can:

A) use a line-extension strategy so the brand name applies to several different products.
B) use brand names that are difficult to pronounce.
C) ask the federal courts to jail anyone who wrongfully uses the brand name.
D) invent new names for its products.
E) notify the public the brand has a registered trademark.