Why are maintenance accounts a threat to operations controls?

A.
Maintenance might require physical access to the system by vendors
or service providers.

B.
Maintenance accounts are commonly used by hackers to access network
devices.

C.
Maintenance personnel could slip and fall and sue the organization.

D.
Maintenance account information could be compromised if printed
reports are left out in the open.

Explanation:
Maintenance accounts are login accounts
to systems resources, primarily networked devices. They often have
the factory-set passwords that are frequently distributed through the
hacker community.