What do the symbols TM, SM, and R in a circle represent?

The symbols TM, SM, and R in a circle each have specific meanings pertaining to trademark rights, making option B the correct choice.

TM signifies that a term, logo, or sign is being used as a trademark but has not been registered with the United States Patent and Trademark Office (USPTO). It indicates that the owner asserts rights over the mark as a source identifier for goods.

SM, on the other hand, is used for service marks, which function similarly to trademarks but identify services rather than goods. Like TM, it can be used without a registration, indicating claim to the service mark.

R enclosed in a circle indicates that the trademark is registered with the USPTO. This symbol provides the legal right to exclusive use of the mark in connection with the goods or services specified in the registration.

Understanding these symbols is crucial in recognizing the rights associated with trademark usage and enforcement, which sets this option apart from the others, which do not pertain to trademark rights directly.