The nurse has provided the patient with information regarding the treatment plan for the diagnosis. ...

D

Feedback
A A referent (e.g., a communication trigger such as a time schedule) motivates one person to communicate with another. The patient's response is not an example of a referent.
B The receiver is the person who receives and decodes the message. The question is asking about the response, not about the receiver.
C Channels are means of conveying and receiving messages through visual, auditory, and tactile senses. The patient's response is not an example of a channel.
D The patient's response is an example of feedback. Feedback is the message returned by the receiver.