The US after WWII:Founding member of the United NationsFounding member of the North Atlantic Treaty OrganizationOpposed communism through the Truman DoctrineWhich other event helped establish the US as a world leader?a. Provided aid for countries through the Marshall Planb. Endorsed the civil rights goals of the Freedom Ridersc. Accepted the demands of the American Federation of Labord. Encouraged allies to sign the Nuclear Non-Proliferation Treaty