Answer: A, C, D

The role of a trademark is in the following aspects: a trademark indicates the source of goods or services, and indicates which company or place the goods or services come from. ; A trademark can distinguish the goods or services provided by one enterprise from the same type of goods or services provided by other enterprises; a trademark marks the quality of certain goods or services; a trademark reflects the reputation of a specific enterprise that provides certain goods or services to the market. Enterprises can also use trademarks to promote their goods or services and increase the company's visibility. Trademarks themselves cannot increase the company's visibility.