Final answer:
The best answer for the author's tone in Geraldine Brook's 'Year of Wonders' is 'emotional, moral,' which captures the humanity and moral dilemmas experienced by characters during the plague.
Step-by-step explanation:
The answer that best completes the blank for Geraldine Brook's Year of Wonders in terms of the author's tone is B) emotional, and moral. This historical fiction novel details the psychological and emotional journey of its characters through a year of living with the plague. What sets this tone apart from the more detached and objective tones of Defoe's and Pepys's works is Brook's focus on the humanity and moral choices of the characters amidst the tragedy they face.