Franklin Delano Roosevelt
A. caused the Great Depression with his New Deal policies.

B. expanded the power of the presidency by creating new government agencies and programs.

C. served as Vice President before being elected President.

D. All of these choices are correct.

B. expanded the power of the presidency by creating new government agencies and programs.

Explanation:

He created many agencies which expended his power.After a convincing victory in the 1936 presidential election, which won 60% of the vote, as well as consolidating the Democratic Party's seats in Congress, he felt that the United States deserved - in addition to a dominant and competent president - an equally competent and capable executive. which led both to enlargement and to the professionalization of presidential staff.Roosevelt noted after the 1936 election that state administration was the most inefficient and least successful segment of his first term, and was grateful that Republicans failed to spot and exploit that weakness during the presidential campaign.