System maintenance must be performed to: (1 point) (points : 1.5) correct software errors.
add new features that have never been requested before.
remove features that none of the users are using.
keep programmers employed.

answer; middle level managers;

answer is:

a). backstage view

explanation:

backstage view is the area where files and data about them is managed— creating, saving, printing, sending to others, inspecting for hidden metadata or personal information, and setting options. so in this way we can add many things to our document swiftly.

i hope you get the idea.