You want to read from a file, whose size you do not know. what can you do to ensure you read all the bytes of data within that file?

While you cannot be sure you have enough memory to hold all the bytes of the file at the same time, you should read the bytes in chunks and discard them after processing. While reading, you keep testing for the end-of-file status.

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.