When working at a restaurant, either as a server or as a cook, you should be wearing not only comfortable shoes, but also footwear that provides safety for the employee.
Restaurants require employees to work with tools such as chef knives, heavy pots and pans, silverware, glasses, etc. Slipping carrying lots of plates or working with fire can cause very serious injuries.
Having said all the above, the best answer is "A.Require all employees to wear slip resistant shoes". This answer explicitly mentions safety.
Answers B, C and D do not apply because they're not related to safety in the workplace.
