Your Patient Has Only 50 ^$\circ$ of Passive and Active Knee Flexion (But Full Passive

Your patient has only 50 ^$\circ$ of passive and active knee flexion (but full passive extension) 2 weeks after removal of a cast for a fracture of the tibia.The bone is now radiologically healed.Each of the following techniques will be of value to increase the range of knee flexion except:

A) The hold-relax technique,with isometric contraction of the hamstrings with the knee at 45 ^$\circ$ ,followed by relaxation,then passive movement into more flexion.
B) Low-load,long-duration self-stretching of the quadriceps.
C) Posterior glide of the tibia.
D) Caudal glide of the patella.