Heart Failure Is Classified into Four Different Stages by the American

Heart failure is classified into four different stages by the American College of Cardiology/American Heart Association. How is the condition of a client in stage B different from the condition of clients in other stages?

A) The client in stage B is supported by a mechanical circulatory assist device.
B) The client in stage B is undergoing treatment for prior symptoms of heart failure.
C) The client in stage B has a history of a previous myocardial infarction.
D) The client with diabetes mellitus has a family history of cardiomyopathy.