Workers' compensation systems have failed to eliminate which of the following employer defenses?

A) Injuries resulting from employee horseplay
B) Implied assumption of risk by the employee
C) Injuries resulting from the negligence of the employee
D) Injuries resulting from the negligence of a coemployee

Workers' compensation systems have eliminated the employer's three traditional defenses: contributory negligence of the employee,assumption of risk by the employee,and the fellow-servant rule (negligence of a coemployee).However,employers might not be held liable for injuries resulting from employee horseplay or self-inflicted injuries.