Which country did the American government help rebuild after World War II$,$ and then it eventually became the third richest economy in the world during the $1960\text{'}$s$?$

West Germany

Japan

USSR

ItalyWhich country did the American government help rebuild after World War II$,$ and then it eventually became the third richest economy in the world during the $1960\text{'}$s$?$

West Germany

Japan

USSR

Italy