You Purchase a Laundry Product That Claims to Use Natural

You purchase a laundry product that claims to use natural enzymes to remove stains from clothing. After spilling grape juice on your favorite shirt, you apply the product and wash your shirt (following the directions, of course) . When you pull the shirt out of the washer, the stain is still there! Which of the following might explain why the stain remover did not work?

A) The stain remover and the grape juice are both hydrophilic, so the enzymes could not interact with the stain.
B) The pH of the water in your house is too basic or acidic for the enzymes to work properly.
C) Before you got home from the store, you stopped at the mall and left your stain remover in the trunk of your car on a hot day, denaturing the enzymes.
D) Both B and C are possible explanations.