The Nurse Has Identified the Collaborative Problem of "Potential Complication

The nurse has identified the collaborative problem of "potential complication: pulmonary embolism" for a patient with DVT.What is an appropriate nursing intervention to prevent embolization of a thrombus?

A) Maintain bed rest until edema resolves.
B) Monitor vital signs and pulmonary status every 4 hours.
C) Apply compression-gradient stockings while the patient is on bed rest.
D) Perform passive range of motion of the affected extremity to increase venous return.