Final answer:
Emergency Department staff is considered to be at high risk for violence in the workplace.
Step-by-step explanation:
The group that is considered to be at high risk for violence in the workplace is c. Emergency Department staff. According to the Occupational Safety & Health Administration (OSHA), emergency department staff are at increased risk of violence due to factors such as work overload, heavy physical work, dealing with patient concerns, and interpersonal problems with other medical staff.