Answer: B) through a character’s actions.
Explanation: In literature, mood is a literary element that evokes certain feelings or vibes in readers through words and descriptions. We can also say that the mood is the emotional setting of the piece or its atmosphere. In the given excerpt, the author establishes the mood through the actions of a character, by describing how the woman walked in the room, tore a handkerchief into ribbons, etc, the author creates a mood of frustration and stress.