The answer for your question is D. The reason why is because the question is asking about " what is the effect of the poetic devices". So for answer D it pretty much explains it all about the effect.
Hope this helps:)
I think its have.
Tell me if I'm right
<span>is an opening to a story that establishes the context and gives background details, often some earlier story that ties into the main one, and other miscellaneous information. so it would be "to set the mood and tone of the play and provide background information"</span>