Question

The 19th Amendment to the U.S. Constitution could be considered a "Progressive" amendment because it

Answer 1

It reformed the law that your "sex" could prohibit you to certain rights.  Its progressive because the progressive era helped reform social injustice and economic injustice, and it was a social injustice to not allow women to vote, so its categorized as progressive.  

Answer 2

D) granted suffrage to all American citizens, regardless of sex.