Explanation:
The correct answer is A) The ditch could be used for protective purposes.
The author makes when she describes a ditch surrounding the mounds that ditch could be used for protective purposes.
An author refers to a writer of a book, document, or any article.
The author makes the point when she describes a ditch surrounding the mounds is that ditch could be used for protective purposes.
Learn more about the author here:
https://brainly.com/question/6560941
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