In an effort to relieve serious and persistent unemployment in the industrialized state of Onondaga, its legislature enacted a statute requiring every business with annual sales in Onondaga of over one million dollars to purchase goods and/or services in Onondaga equal in value to at least half of the annual sales in Onondaga of the business. Which of the following constitutional provisions is the strongest basis on which to attack this statute?
The due process clause of the Fourteenth Amendment. The equal protection clause. The commerce clause. The privileges and immunities clause of the Fourteenth Amendment