Which Nursing Action Is Correct When Performing the Straight-Leg Raising

Which nursing action is correct when performing the straight-leg raising test for an ambulatory patient with back pain?

A) Raise the patient's legs to a 60-degree angle from the bed.
B) Place the patient initially in the prone position on the exam table.
C) Have the patient dangle both legs over the edge of the exam table.
D) Instruct the patient to elevate the legs and tense the abdominal muscles.