Which of the Following Is True of Drug Sensitization

Which of the following is true of drug sensitization?

A) Drug sensitization involves a progressive decrease in behavioral actions of a drug over time.
B) Drug sensitization is more common than is drug tolerance.
C) Drug sensitization is less common than is drug tolerance.
D) Drug sensitization involves a decrease in the number of drug receptors.
E) Most drugs exhibit some form of sensitization.