The only answer that makes sense is C, Judicial review. The judicial branch specifically has the power to review laws passed by the legislative and executive branches and invalidate or amend them. Their main purpose in this process is to determine whether a law is constitutional or unconstitutional, and is a check against the other two branches.
I believe its abolishing slavery!
Feudalism formed with the gaining strength of the Shogunate. Samurai became a vital part of Japan, and people pledged their life to farms in exchange for protection.
