Answer:
D. What is the length of this document?
Step-by-step explanation:
To understand the perspective of an author who wrote a document, you must stick to the facts that led him or her to write that document, what was the intended audience, and what are the bases and values of that author. This information will help you understand the historical context in which the document was written. However, the length of the document is not relevant, as it does not affect the perspective of the author, which is what you seek to examine.