Individuals with the Disease Phenylketonuria (PKU) Should NOT Consume the Artificial

Individuals with the disease phenylketonuria (PKU) should NOT consume the artificial sweetener aspartame. Why?

A) People with PKU are highly prone to development of diabetes.
B) People with PKU are allergic to the sweetener.
C) People with PKU experience severe headaches when they consume aspartame.
D) People with PKU cannot metabolize the amino acid phenylalanine.