The one that correctly recounts the key purpose of the narrative in the given paragraph would be:
A). Creating setting
The setting is denoted as the details about the background(location, time, and situations) in which the narrative is established.
In the given para, the author's main purpose is to develop a setting that will introduce the readers to the context of the narrative.
The descriptions like "room...windows...long, narrow, pointy...oaken floor...chamber...fretted ceiling, etc." substantiates the point that the author aims to ground the setting into the readers' mind.
Thus, option A is the correct answer.
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