Your assignment in biology lab is to design an experiment that would detect whether a substance is breaking down, or digesting, a protein. Which of the following experimental designs would be your best choice? A. Test tube A: Water and egg white Test tube B: Water, egg white, and pepsin. Procedure: Test the pH of both tubes at the same temperatures for consistency. B. Test tube A: Water and soy protein Test tube B: Water, egg white, and pepsin Test tube C: Water, egg white, acid, and pepsin Procedure: Observe each test tube for changes in the protein every 15 minutes. C. Test tube A: Water and egg white Test tube B: Water, egg white, weak acid, and pepsin Test tube C: Water, egg white, strong acid, and pepsin Procedure: Record the mass of the egg white in each test tube before you begin. Measure the egg whites every 15 minutes.