He returned Japan to imperial rule
The answer is C:By improving working conditions. Have a nice day!
Https://www.u-s-history.com/pages/h663.html
this is what I got from Google-
When the U.S. Supreme Court ruled in the Dred Scott decision that the Missouri Compromise's prohibition of slavery in territories was unconstitutional, an increasingly diverse body of opponents of slavery rallied around the Republican Party.
