You Are Passively Stretching the Hip Flexors of a Patient

You are passively stretching the hip flexors of a patient in the position of prone hip extension and knee flexion.You later note that the patient demonstrates greater hip extension passive range of motion (PROM) when you allow the knee to be straight during the stretching procedure.The reason for the improved hip extension PROM may best be explained by ____________________.

A) elimination of active insufficiency that occurred during the original position
B) elimination of passive insufficiency that occurred during the original position
C) elimination of both active and passive insufficiency that occurred during the original position
D) activation of passive insufficiency that occurred in the second position