Which person is considered one of the most popular jazz artists of the 1920s?

(A) describing some effects of the professionalization of the study of history on the writing of women's history.

Explanation:

This is the main purpose of this text. In this text, the author wants to describe how the professionalization of the study of history had a profound effect on the writing of women's history. The author tells us that, as history became more professionalized, historians became more strict when choosing their sources. Women were not included in this assessment of reliable sources, as they were more "private" than "public" citizens. Moreover, men writing on women were ignored because of the mistrust of secondary sources. This led to the near elimination of women from history.