1. Denouement - B. We are left to wonder what was real and what was a dream.
A denouement is the final piece of the story. In this part, all the plots of a narrative come together to a close, either through a definitive conclusion or a cliffhanger. In "Was It a Dream?", we were left to wonder which events were true and which weren't - and we were left with that ending.
2. Falling action - A. The main character falls unconscious on the grave.
A falling action is typically the act four or five of a narrative, where the plot just went through its climax and the tensions need to be lowered in order to prepare for the finale or the denouement. In the story, the falling action begins with the event described in option A.
3. Exposition - C. We learn that the woman died after developing a cough.
An exposition is sort of like an introduction to a narrative where all necessary details would be told to the readers/audience. From the term itself, certain details are exposed to the readers. This is used to get the readers to jump into the world. Choice C contains an event that we have learned from the exposition.
4. Rising action - D. The main character looks for his lover's tombstone.
A rising action is the piece of the narrative that most of the time immediately follows the exposition. In this part, tensions in the narrative would slowly start to build up in order to lead the readers to a climax - the highest moment of the story. In "Was It a Dream?" we find the main character looking for his lover's tombstone after we learned that she died after having a cough.