What is a document? a information about a computer file, distinct from the information it contains
a set of information gathered together
a two- to four-letter string set to the right of the dot in a filename; this designates the type of information in the file
a computer file representing a specific text item

answer is Set of information gathered together

A document is a written, drawn, presented, or memorialized representation of thought, often the manifestation of non-fictional, as well as fictional, content. The word originates from the Latin Documentum, which denotes a "teaching" or "lesson": the verb doceō denotes "to teach" In general, a document (noun) is a record or the capturing of some event or thing so that the information will not be lost.  A document is a form of information. A document can be put into an electronic form and stored in a computer as one or more files. Often a single document becomes a single file.

it can either be 2. or 4. : ) tell me if i'm wrong or right