In Marketing, "Doppelgangers" Refers to

In marketing, "Doppelgangers" refers to

A) products that are so similar to one another in form and function that trademarks cannot be issued to either one.
B) products that are almost identical, but are registered independently with two different trademarks in two different countries.
C) parodies of existing well-known trademarks that have been created through digital technology.
D) two trademark symbols that so closely resemble one another in appearance they can barely be told apart.
E) two distinctly different products (and product classes) whose colors are too similar to one another causing customers to believe both products are owned by the same company.