Some topics are general and are regarded as 'classical' because they are always relevant across time periods through being relatable even as time progresses. For example, topics or themes about politics and satire would still prevail until now. Other topics or themes (such as viral videos) are only for that particular event and do not always occur, thus they do not prevail in the long run.
I believe the correct answer to your question would be B) to demonstrate how the theme and plot of a play create meaning. Because its what happens in the story and why its important to the story.
4. "snapped in the face of the open-mouthed oncoming wave of dogs"
This us the correct answer because it shows how brave White fang is while fighting back at these dogs.
Hope this helps!!