In a teaching session, Heart failure is correctly explained as:

A. Heavy proteinuria with hypoalbuminaemia, oedema and often hyperlipidaemia. B. A syndrome in which the heart cannot meet metabolic demands or does so only at elevated filling pressures. C. Neurological deficit caused by interruption of cerebral blood flow due to arterial occlusion. D. A chronic inflammatory airway disorder with variable and usually reversible airflow obstruction.