The activities of the congressional union for woman suffrage contributed directly to the ratification of the 19th Amendment.
Both the congressional union for woman suffrage and National Woman's Party was formed fight for women's suffrage.
- Women's suffrage refers to right of women to vote in both the national or local elections.
- Hence, activities of the congressional union for woman suffrage contributed directly to the ratification of the 19th Amendment.
Therefore, the Option D is correct.
Read more about 19th Amendment
brainly.com/question/200404