Which country assisted Japan as it moved from a monarchy to a representative democracy?

A.

Great Britain

B.

Russia

C.

the United States

D.

China

the country that assisted Japan as it moved from a monarchy to a representative democracy was: C. the united states after united states beats the Japanese in world war 2, we occupy Japan for a while to tidy up some political mess that created there. During that time, United states spread its democratic influence within Japanese government and Japan has became one of our allies ever since