A patient asks, "Why am I getting three drugs for my cancer if they all do the same thing?" What is the nurse's best response?
A. "Administering more than one drug prevents drug resistance."
B. "More than one drug is administered in case you don't respond to one of them."
C. "This makes your treatment more cost-effective."
D. "We are not sure what drug will be the most effective, so this combination ensures success."