8. A person whose participation in the marketing of controlled dangerous substances is grounds for liability pursuant to this act shall be rebuttably presumed to be liable for damages incurred by the plaintiff in the following percentages:
a. For a level 1 offense, 25 percent of the damages;
b. For a level 2 offense, 50 percent of the damages;
c. For a level 3 offense, 75 percent of the damages; and
d. For a level 4 offense, 100 percent of the damages.