Which of the following promotions is an example of public relation practice?

Group of answer choices

An ad in a local newspaper portraying a dentist explaining the benefits of using Colgate.

A salesperson presenting solutions to a decision$-$making committee.

A $10\%-$off sales promotion campaign of a popular coffee brand.

A salesman at your door who doesn$$t want you to buy a new product but only wants you to understand its benefits.

None of the above.