Which of the Following Is Things Need Not Be Shown

Which of the following is things need not be shown by a worker in order for her to have a claim under workers' compensation:

A) the worker must have a personal injury
B) the injury must be the result of an accident or occupational disease
C) the employer must be at fault for causing the injury
D) all of the other specific choices are unnecessary for a claim
E) none of the other specific choices are unnecessary for a claim