What are the different classes of trademarks?

A. Copyrightable marks B. Trade names C. Service marks D. Industrial design marks

The correct answer is A. Copyrightable marks

A copyrightable mark is a mark that identifies the source of a product or service. It can be a word mark, a symbol mark, or a logo. Copyrightable marks can be registered with the United States Patent and Trademark Office (USPTO).