What was Susan B. Anthony known for?

Susan B. Anthony is primarily known for her tireless advocacy for women's rights, especially her significant role in the women's suffrage movement, which fought for women's right to vote. She co-founded the National Woman Suffrage Association and played a crucial part in organizing campaigns and public speaking events to raise awareness about gender equality and women’s rights. Anthony also famously cast a ballot in the 1872 presidential election, asserting her belief that women deserved the right to vote, which led to her arrest and a trial that brought national attention to the movement.

The other options relate to important social issues, but they don't accurately reflect Anthony's primary legacy or contributions. While she may have supported various reforms during her lifetime, her most notable and recognized efforts were focused specifically on advancing women's rights.