Which of these two ways does Cisco recommend that you use to mitigate maintenance-related threats? (Choose two.)

A.
Maintain a stock of critical spares for emergency use.

B.
Ensure that all cabling is Category 6.

C.
Always follow electrostatic discharge procedures when replacing or working with internal router and switch device components.

D.
Always wear an electrostatic wrist band when handling cabling, including fiber-optic cabling.

E.
Always employ certified maintenance technicians to maintain mission-critical equipment and cabling.