What Obstacle Did Harry Truman Face When He Assumed the Presidency

What obstacle did Harry Truman face when he assumed the presidency following the death of Franklin Roosevelt in April 1945?

A) Roosevelt's popularity made it difficult for Truman to win the respect of Congress and the people.
B) At this time in the war, Americans were looking for a president with a military background, something Truman could not offer.
C) Truman had been such an aggressive power player in Congress that he was likely to face stiff opposition there.
D) Harry Truman had absolutely no experience in foreign policy, the most important qualification at this point in American history.
E) Roosevelt had become so unpopular with the American people that his vice president was likely to have to pay for the sins of his predecessor.