C. The powerful nature of love can enrich or destroy.
Explanation:
Theme is very crucial to a literary work as it elaborates the author's key concern and ideas and hence, it has to be complete in itself and engaging enough to grab the audience's attention. Thus, third option best illustrates the complete literary theme of a text as it indicates to be equipped with the essential contents to drive a plot and the story. This theme can also function as the recurring conflict throughout a work and thus, would assist the audience to relate to the text in the most effective manner among all these.<em>It would cover the wider audience while the other options would relate to a particular section. For example, the first one is relating to "teenagers", relationships, true love in which not every one is interested.</em>
