Which of the following is a common mistake people make when writing summaries

There not that many but I'll tell you what I think. Some people may misspelled some words, and copying instead of thinking. Hope this helps!

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.