Answer:
The correct answer is the following:
1. Exposition - B. we learn that the main character was madly in love.
2. Falling action - C. The main character falls unconscious on the grave.
3. Climax - D. The main character reads the true inscription on the lover's tombstone.
4. Rising action - A. The main character spends the night in the cemetery.
Explanation:
That plot order satisfies the narrative structure: first we are introduced to the character and the problem: he was madly in love.
After that, the plot develops the problem and creates suspense: the main character spends the night in the cemetery.
Then comes the climatic moment and paramount of the story: the main character reads the true inscription on the lover's tombstone.
Finally, we know what happened after the climax and brought the story to the end: the main character falls unconscious on the grave.