Your Patient Reports Having Had a Sudden Onset of Severe

Your patient reports having had a sudden onset of severe pain in the left posterior thigh yesterday while sprinting.Today he is unable to fully extend his left knee while walking because of pain.Which of the following interventions is most appropriate today?

A) Passive knee flexion/extension with the hip flexed to 90°
B) Passive knee flexion/extension with the hip positioned in 0° extension
C) Active knee flexion but no passive or active extension
D) Submaximal resisted knee flexion in the prone-lying position