Which of the Following Would a Business Law Professor Most

Which of the following would a business law professor most likely identify as being a connection between trademarks and tradenames?

A) The use of both to denotes registration of the distinguishing guise of business products.
B) The use of both gives an indication that a product meets a defined standard.
C) Adoption of one by a business may prevent registration by competitors of the other.
D) Closely related trademarks are tradenames that receive protection under trademark law.