At 4 AM, the Hemodynamic Monitor for a Critically Ill

At 4 AM, the hemodynamic monitor for a critically ill client in the intensive care unit indicates that the client's mean arterial pressure is at the low end of the normal range; at 6 AM, the client's MAP has fallen definitively below normal. The client is at risk for

A) pulmonary hypertension.
B) left ventricular hypertrophy.
C) organ damage and hypovolemic shock
D) orthostatic hypotension.