In a California workers' compensation claim, apportionment can assign part of the impairment to preexisting conditions or non-work factors. Which of the following is a correct consequence?

• A. It has no effect on the total award.
• B. It increases the wage replacement period.
• C. It reduces the amount of permanent disability by attributing impairment to non-work-related factors.
• D. It converts the claim to a medical-only claim automatically.

Answer: (C)