The Client Asks the Nurse Why There Aren't Better Drugs

The client asks the nurse why there aren't better drugs for human immunodeficiency virus (HIV) infection when so much money is spent on research. What is the best response by the nurse?

A) "Antiviral drugs are almost impossible to create."
B) "Developing new drugs is difficult because the virus mutates so readily."
C) "Developing new drugs is difficult because people think acquired immune deficiency syndrome (AIDS) is a rare disease."
D) "Developing new drugs is difficult because we still do not understand the virus."