Which word is the subject in the sentence my best friend's birthday is today?

Which statement best describes hopping’s viewpoint and purpose in this excerpt? the author believes diane france should not display soldiers’ remains, and she writes to persuade readers to avoid visiting the museum. the author thinks a union warship caused the submarine to sink, and she writes to inform readers about the war. the author thinks stories about the civil war are interesting, and she writes to entertain readers with true war stories. the author believes diane france’s work in making bone casts has many scientists, and she writes to give details about her experienc