The Nurse Is Instructing the Client on How to Use

The nurse is instructing the client on how to use the client-controlled analgesia (PCA) pump.Which statement made by the client indicates an appropriate understanding of the nurse's instructions regarding the use of the PCA pump?

A) "I will push the button continually until I am pain free."
B) "I will likely overdose on pain medication with the use of the button."
C) "I will let my family control my pain medicine by allowing them to push the button."
D) "I will push the button when the pain becomes severe."