Daphne's speech is more effective because it includes relevant historical quotes, as option D shows.
They are references to a historic period.
They are credible research sources.
They are evidence about a certain period.
The use of historical references shows that Daphne has done a great deal of research on the subject she is addressing, in addition to looking for reliable research sources. These quotes enrich her text and show evidence that supports the points she makes.
Learn more about textual evidence:
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