Which sentence is the best example of a thesis statement for a literary analysis of Romeo and Juliet?

The correct answer is the first sentence. That is because the second is just a statement that would be elaborated in the paper, not a thesis. The third and the fourth are not it because they are not the theme of the play, since they don't try to end the feud, they just love each other, and also their marriage in secret is not important for the overall course of the play since it could've not happened and still the things would play out the same.