Ralph Nader, a member of the school board in San Joaquin County, is appalled at the amount of junk food in the schools. He convinces the state legislature to pass an ordinance that no stores may sell any unhealthy, junk food within 500 feet of any school, including colleges or day care centers. A professor of business law raises the issue of whether the regulation is valid and is told that it is a valid exercise of the jurisdiction's police power to protect its citizens. Convenience stores balk at the regulation and challenge it in court. In determining whether the law is constitutional, which of the following will a court likely ask?