Why did the United States play a MAJOR role in rebuilding Japan after World War II?

Responses

Ato turn an enemy into an ally and to create a more democratic Japan
to turn an enemy into an ally and to create a more democratic Japan
Bto form an alliance with Japan that would work against communist China
to form an alliance with Japan that would work against communist China
Cto place American-owned businesses throughout Japan and control its economy
to place American-owned businesses throughout Japan and control its economy
Dto prevent Vietnam from becoming the dominant country in the post-war region

to prevent Vietnam from becoming the dominant country in the post-war region