Which example best demonstrates the use of an influencer in advertising?

Multiple Choice

A company uses artificial intelligence to determine where a customer is and sends them coupons when they are close to the company$$s physical location.

The office supply salesperson makes a sales call on the president of a university to see if she will weigh in on the university$$s purchasing decisions.

A company pays an actor to be in its commercials.

A sales promotion manager hands out company swag to industry leaders at a trade show.

A Facebook fitness star is paid by Nike to promote and wear its shoes and apparel in all of her videos.