The answer to your question is Dialogue.
She uses dialogue.
I believe that the correct option is: D) colons.
Extended quotations that are longer than three lines are introduced with a colon and then they start on a new line but having its entirety indented half an inch from the left margin.
For example:
Mary begins to talk about her past:
(this is where the quotation is)
Answer:
it is a convincing argument because of the several examples. It was a good idea to compare conflict with animals, which we are similar to and how they do it often with attacking, but at a grand scale.
