During the late 1860s as Republicans lost interest in the South, American women like Susan B. Anthony

A) fought women's rights

Explanation:

It is not like Susan B. Anthony remained at home. It also doesn't make sense for her to join the U.S. Army. Lastly, it makes no sense at all that she gave up on helping other women. So, A. is the only one that makes any sense.

b. sec, foreign relations

uncle sam would be tossing and turning in his grave : *)