Lake City enacts an ordinance that bans the distribu-tion of all printed materials on city streets. Mackensie opposes the city's latest "revenue-enhancing" measure and wants to protest by distributing handbills. In her suit against Lake City, a court would likely hold the ban on printed materials to be

a. ​unconstitutional under the commerce clause.
b. ​constitutional under the First Amendment.
c. ​unconstitutional under the First Amendment.
d. ​not subject to the U.S. Constitution.