Although the novel’s plot is complex and ambitious, the novel’s greatest strength is the author’s ability to create richly imagined, unforgettable characters. For example, the central character, a young woman named Mina, is given a vivid and compelling portrait, filled with contradictions and nuances. The author’s use of dialogue adds a depth of characterization, revealing their inner lives and motivations.

Which choice best explains the overall effect of the author's focus on characterization in this passage?