Carter Just Had Heart Surgery Is Waking Up from the Anesthesia

Carter just had heart surgery is waking up from the anesthesia. As per hospital protocol, the nurse asks him his name and where he is, and, while he remembers his name, he believes that he is in an airport and is quite concerned about getting to his plane on time. Later that day, he mistakes his adult daughter for his long-deceased sister. Within a day, however, he seems to be back to his usual self, knows who his family members are, and recalls that he has just had major surgery. Carter has likely experienced

A) delirium.
B) dementia.
C) Alzheimer's disease.
D) Korsakoff's syndrome.