What does apportionment mean in permanent disability determinations?

What does apportionment mean in permanent disability determinations?

• A. Apportionment assigns part of the impairment to preexisting or non-work-related factors, reducing the award.
• B. Apportionment increases the impairment rating by including preexisting factors.
• C. Apportionment has no effect on the award.
• D. Apportionment applies only to medical treatment.

Answer: (A)