Read the section of the article named "Duties." Which selection from the section shows a way that advertising managers get customers interested in a product or service?

A. Larger companies may have several advertising managers that work with them.

B. They do research studies that help them to understand customers and what they want to buy.

C. Some advertising managers are known as account executives. They manage customer accounts.

D. The job of creating ads and making commercials is done by the creative department of the company.