The correct answer is C.

“I remember that you are my nurse and your name is Lisa.” This statement indicates an improvement in the condition of delirium, which is a temporary mental state characterized by confusion, anxiety, incoherent speech, and hallucinations.

Delirium can be caused by various factors, such as fever, infection, medication, surgery, or alcohol or drug use or withdrawal.

Delirium can have different types: hyperactive, hypoactive, or mixed.

Delirium can be distinguished from dementia by its acute and fluctuating onset, reduced awareness of surroundings, and poor thinking skills.

Choice A is wrong because “I don’t know where I am or what day it is.” indicates a lack of orientation to time and place, which is a sign of delirium.

Choice B is wrong because “I feel so sleepy all the time.

I just want to rest.” indicates a hypoactive type of delirium, which is characterized by reduced activity, sluggishness, and drowsiness.

Choice D is wrong because “I still hear voices sometimes, but they are not as loud.” indicates a presence of hallucinations, which is a symptom of delirium.

Normal ranges for cognitive function in older adults depend on various factors, such as age, education, culture, and health status.

However, some general indicators of normal cognition include being able to recall recent events, recognize familiar people and places, communicate clearly and coherently, and perform daily activities independently.

References:.

• Delirium - Symptoms and causes - Mayo Clinic .

• Delirium in elderly adults: diagnosis, prevention and treatment .