Stаte Green pаssed а statute requiring all cоmmercial trucks passing thrоugh the state tо use Type A tires, even though all other states permit the use of either Type A or Type B tires on commercial vehicles. The United States Supreme Court struck down the state Green statute and stated in its opinion that Type A and Type B tires are equally safe. Subsequent to the Supreme Court decision, the legislature of state Yellow enacted a statute requiring the use of Type B tires by commercial vehicles and banning the use of Type A tires by commercial vehicles. The statute states that the reason for the prohibition is that Type A tires are dangerous. Which of the following would be the basis for the best argument for striking down the state Yellow statute as unconstitutional?