Technology Has Also Been Brought to Bear to Help Stroke

Technology has also been brought to bear to help stroke patients regain movement capabilities. Completed research along these lines suggests that

A) Stroke patients might benefit from virtual reality that increases the gain of patients' movements
B) Stroke patients might benefit from virtual reality that decreases the gain of patients' movements
C) Stroke patients might benefit from robots that assist or, in some cases, resist movements
D) All of the above