The LPN/LVN Approaches and Asks the RN to Check and Make

The LPN/LVN approaches and asks the RN to check and make sure the continuous passive motion (CPM) machine is set up correctly before it is turned on.Which assessment by the RN is most important?

A) Verify that the sheepskin does not have any folds.
B) Stand at the foot of the bed to inspect the alignment.
C) Check to see whether the CPM machine is plugged in.
D) Validate that the settings are as prescribed by the physician.