All but One of the Following Experiments Would Allow a Scientist

Multiple Choice

All but one of the following experiments would allow a scientist to discover if the phenotype of an organism would be affected by environmental changes; choose the experiment that would not show environmental effects.

A) Cuttings are taken from an English Ivy plant and are then grown in soils with different pH levels.
B) A Siamese cat has patches of fur removed from its hips and an ice pack is secured over the area.
C) A mouse with the genetic disorder phenylketonuria (PKU) is fed a diet low in phenylalanine for a year and then changed to a diet rich in the same molecule.
D) A group of mice that show the same dominant trait are fed a variety of diets to determine if they show different body types.
E) A hydrangea is grown for one year in aluminum poor soil and then grown for one year in aluminum rich soil.