Which of the Following Brought About the Ratification of the Nineteenth

Which of the following brought about the ratification of the Nineteenth Amendment, which gave women the right to vote?

A) diplomatic pressure from international human rights agencies
B) pressure from all states of the country to include the provision
C) ratification of the Fifteenth Amendment that provided the right to vote regardless of race
D) several European countries providing the right to vote to women
E) women voting at the subnational level in some states