Philip Suffered Great Pain in the Elbow of His Phantom

Philip suffered great pain in the elbow of his phantom arm,which seemed to be locked in an awkward position.Ramachandran successfully treated him by

A) injecting his stump with stem cells.
B) injecting his stump with curare.
C) having him practice moving his phantom limb while he imagined that he saw it moving.
D) having him make synchronous, bilaterally symmetrical movements of "both arms" while directly viewing his good arm and a mirror image of it where his phantom limb would have been.
E) having him practice moving his phantom limb while his good arm was tied down.