1. I would say D.
2. I would say C.
You will gain more health benefits because your training the muscles to be under stress.
With spinal cord injury if you injure the cervical or thoracic areas, it will affect breathing, could cause you to breath with intercostal muscles because diaphragm doesn't function or cause paralysis.
traumatic brain injury can leave injuries to multiple areas. could cause shock, death, heart issues, and so on.
