After examining studies indicating that drinking soda pop was directly related to the incidence of tooth decay, the legislature of the state of Tenacka enacted a law prohibiting the advertising of any soda pop in all media

A state may not interfere with commercial speech.

Step-by-step explanation

The law prohibits the advertising of any soda pop in all media. This includes radio, television, and any advertisement on the internet. This restriction on commercial speech is unconstitutional because it is not narrowly tailored to achieve a compelling state interest. There are less restrictive ways of protecting the public against tooth decay which would be equally effective. For example, nondiscriminatory banning of vending machines in schools, requiring health warnings on all soda pop cans, and increasing taxes on soda pop are all less restrictive ways of protecting the public against tooth decay which would be equally effective.