In general workers' compensation is

a. designed to cover the cost of lost time due to injury or illness, but not the cost to treat the illness/injury

b. designed to cover workplace injury and illness cost, but not lost time

c. designed to cover injuries, regardless of whether they occurred while at work

d. a system that requires that an injured employee prove that the employer was negligent and that the negligence was the cause of the employee's injury

e. an absolute liability and exclusive remedy system