What helps a literary critic determine a story's complex theme are the specific details within the story. These details are what makes a story complex or simple - if there aren't enough details (or if there are, but they are pretty obvious to figure out), then a story would be simple. But if the details are difficult to understand and need to be explored and researched thoroughly, then it would be a complex story.
There aren't any options but some dramatic irony from Romeo and Juliet is that they wanted to be together so much that they actually ended up killing themselves