What Is the Significance of Margaret Fuller's Book Woman in the Nineteenth

What is the significance of Margaret Fuller's book Woman in the Nineteenth Century ?

A) It is the first complete history of U.S. women.
B) It was the first book to promote separate spheres ideology.
C) It argued that a woman could not achieve intellectual fulfillment unless she was free to develop her mind without the fear of being labeled "masculine."
D) It became the cornerstone of the women's suffrage movement.
E) None of these choices