Existing Documents or Statistics Research Is ____________

Existing documents or statistics research is ____________.

A) a method that involves the collection and reanalysis of existing quantitative data
B) a nonreactive method used to examine the content, or information and symbols, contained in written documents or other communication media
C) the unobtrusive collection of data that have usually been left behind by others
D) a method that uses a written questionnaire or formal interview to gather quantitative data on the backgrounds, behaviors, beliefs, or attitudes of a large number of people or agencies