问题详情

The short-term goal of the research is to help a person
A．whose motor codex is seriously damaged.
B．who can operate a wheelchair but not a robotic limb.
C．who has spinal cord injury but is able to move a wheelchair.
D．who is unable to move but whose motor cortex is not damaged.请帮忙给出正确答案和分析，谢谢！