Which of the Following Studies Is Not Considered to Be

Multiple Choice

Which of the following studies is not considered to be "Chemistry?"

A) Studying the interactions between energy and matter.
B) Classifying elements into metallic, nonmetallic or semimetallic.
C) Studying the interactions between matter and other matter
D) Removing harmful impurities from a synthetic drug.
E) Separating the light spectrum into its component colors.