Answer:
A. Review of business documents
Step-by-step explanation:
In information gathering process some research or resolving some technical issue, it is necessary to gather data or enlist highly technical questions concerning the overarching system that is already in place.
To gather answers that are enlisted above can be answered with the help of literature review or review of business document.
Literature review is the review of past work related to some particular topic that can be gather from different journal articles, conference publications or book.