The nurse understands that when the spinal cord is injured, ischemia results and

The nurse understands that when the spinal cord is injured, ischemia results and edema occurs. How should the nurse explain to the patient the reason that the extent of injury cannot be determined for several days to a week?
1. “Tissue repair does not begin for 72 hours.”
2. “The edema extends the level of injury for two cord segments above and below the affected level.”
3. “Neurons need time to regenerate so stating the injury early is not predictive of how the patient progresses.”
4. “Necrosis of gray and white matter does not occur until days after the injury.”