Final answer:
Postpartum psychosis is a rare but serious mental health condition that can occur after childbirth. Delirium, characterized by severe confusion and altered mental functioning, is a common symptom seen in women experiencing postpartum psychosis.
Step-by-step explanation:
Postpartum psychosis is a rare but serious mental health condition that can occur after childbirth. It is characterized by symptoms such as disorientation, confusion, hallucinations, and delusions. The most likely option from the ones provided that would lead a nurse to suspect postpartum psychosis is A) Delirium. Delirium refers to a state of severe confusion and altered mental functioning, which is a common symptom seen in women experiencing postpartum psychosis.