The Nurse Is Caring for a Patient with a Diagnosis

The nurse is caring for a patient with a diagnosis of pulmonary embolism.The nurse understands that the most common cause of a pulmonary embolus is

A) amniotic fluid embolus.
B) deep vein thrombosis from lower extremities.
C) fat embolus from a long bone fracture.
D) vegetation that dislodges from an infected central venous catheter.