The nurse is assessing an older adult client who is having difficulty remembering events from earlier in the day and concentrating on the questions being asked. A family member shares that the client's home was recently sold and the client has just moved in with them. Which nursing response best promotes effective communication with the family?

Delirium is often a sign of underlying mental illness and institutionalization is often necessary.

The client is exhibiting symptoms of dementia and because of age, it may be permanent.

The client's delirium may be due to depression and is possibly reversible.

If the dementia is a result of Alzheimer's disease, it is often reversible even in the late stages.