Which Therapeutic Scenario Does Not Illustrate the Concept of Treating

Which therapeutic scenario does not illustrate the concept of treating a genetic disease by modifying its full phenotype?

A) A child who cannot produce enough growth hormone is injected with the correct amount of growth hormone needed to achieve normal growth.
B) A person with hypercholesterolemia is prescribed a medication that blocks the synthesis of cholesterol.
C) A lactose-intolerant person follows a strict diet to avoid lactose-containing foods.
D) A nearsighted person is able to see correctly by wearing prescriptive glasses.
E) Painkillers are provided to an individual with sickle-cell disease.