What determines the technical controls used to restrict access to USB devices and help prevent their use within a company?

What determines the technical controls used to restrict access to USB devices and help prevent their use within a company?
A . Block use of the USB devices for all employees
B . Written security policy prohibiting the use of the USB devices
C . Acceptable use policy in the employee HR on-boarding training
D . Detect use of the USB devices and report users

Answer: A