The Nurse Is Teaching a Client Who Is Alert and Oriented

The nurse is teaching a client who is alert and oriented about the drug warfarin.When teaching the client about this drug,the nurse emphasizes the need to be consistent with Vitamin K intake,which is found primarily in green leafy vegetables.When the client's spouse comes to visit,the client states,"I can no longer consume green leafy vegetables." This is an example of what type of failure caused by a communication problem?

A) System failure
B) Reception failure
C) Transmission failure
D) Global aphasia