What evidence supports the statement that franklin d. roosevelt was responsible for the greatest expansion of federal power in the 20th century? a) his four terms in office and his legacy affecting u. s. politics for decades to come b) his involvement in planning for the post-war world at the yalta and teheran conferences c) the rapid expansion of government programs under the new deal and mobilization for world war ii d) the judiciary reorganization bill of 1937, which was designed to add new justices to the supreme court eliminate