What would historians say about Susan Anthony’s greatest achievement?

What would historians say about Susan Anthony’s greatest achievement?

• A. She was an activist and raised a family at the same time.
• B. She worked with abolitionists to get the country rid of slavery.   
• C.  Her tireless efforts to guarantee women the right to vote led to the establishment of the 19^th Amendment to the Constitution.
• D. Women had the legal right to vote under the provisions of the 14^th and 15^th Amendments to the Constitution.