A Trademark Is

A trademark is

A) any word, device (design, sound, shape or color) , or combination of these used to distinguish a seller's products or services.
B) the part of a brand that can be spoken.
C) the part of a brand that is a symbol or design and cannot be vocalized.
D) the commercial, legal name under which a company does business.
E) the identification that a firm has legally registered its brand name or trade name so the firm has its exclusive use, thereby preventing others from using it.