The central idea across these paragraphs is best captured by the option that states: "Alvarez explains how her mother's reaction to her novel provoked a rare moment of peace between them."
In the excerpt, Alvarez reflects on her mother's emotional response to the novel, showcasing how the act of writing helped bridge a significant emotional gap. The moment is described as one of connection and mutual understanding, illustrating a rare instance where the author does not feel the need to respond or defend herself, highlighting the peace brought about by her mother's pride and emotional reaction.