Final answer:
In comparative negligence, if a plaintiff is 20% at fault and the defendant is 80% at fault, the plaintiff recovers 80% of the damages awarded. Therefore, the correct option is C.
Step-by-step explanation:
Under the comparative negligence recovery theory, when determining damages, a plaintiff's recovery is reduced by their percentage of fault. If the plaintiff is found to be 20% at fault and the defendant 80% at fault, the plaintiff's recovery of damages will be reduced by their 20% of fault. Thus, the plaintiff would recover 80% of the total damages awarded. Therefore, the correct answer to the question is c. 80%.