B. A new Democratic voting bloc of minorities and organized labor contributed to Roosevelt's success.
Explanation:
At the 1931 Democratic Party convention, he was elected presidential candidate.
In the 1932 election, Franklin Delano Roosevelt claimed the overwhelming victory - only six states did not vote for him.
At the presidential inauguration of 1933 in March, he promised the New Deal, social measures during a time of deep economic crisis that brought him great popularity.
The American Federation of labor made it successful than other unions of the time because it was a loose organization of skilled workers from many unions devoted to specific crafts or trade.
