The right answer is C) Japan became an ally of the United States.
After the defeat at WWII, Japan was in need to reconstruct its economy and the Allied Powers occupied the country to help in this solution. The Allied help was mostly led by American forces, and they implemented a series of reform policies, such as land reforms, labor democratization end the breakup of the zaibatsu. The U.S. Occupation of Japan set forth a series of reform policies to reconstruct and recover the devastated nation and ultimately creating the opportunity to become the economic superpower.