Final answer:
The section from Stephen Crane's "A Great Mistake" signifies the beginning of conflicts and the character's desires, thus categorizing it as part of the Rising Action in the plot structure.
Step-by-step explanation:
The section of Stephen Crane's "A Great Mistake" where it mentions, "For a time he was a simple worshipper at this golden shrine. Then tumultuous desires began to shake him. His dreams were of conquest," falls under the category of B. Rising Action. In the plot structure, the rising action refers to the series of events that build up to the climax of the story. This part of the story usually introduces new conflicts or challenges, and we see the characters reacting to these and developing further.
In the passage quoted, we witness the character experiencing tumultuous desires and dreaming of conquest, indicating that tensions and complications are building. This is characteristic of the rising action, where the character encounters conflict and begins to set out on a journey or quest that will eventually lead to the climax.