Following the Application of a Hip Spica Cast for a Patient

Following the application of a hip spica cast for a patient with a fracture of the proximal third of the left femur,what is an appropriate nursing intervention?

A) Reposition the patient,using the support bar at the thighs.
B) Assess the patient for abdominal pain,and nausea and vomiting.
C) Psychologically prepare the patient for a long period of bed rest without ambulation.
D) Turn the patient to the prone position every 4 hours to promote drying of the posterior part of the cast.