The Most Significant Development in the Democratic Convention of 1944

The most significant development in the Democratic convention of 1944 was that

A) Roosevelt's third-term vice president, Henry Wallace, was dumped in favor of Senator Harry Truman.
B) Roosevelt's appearance at the convention revealed how physically frail he was.
C) party leaders developed a campaign that downplayed the New Deal's success.
D) there was growing resistance to Roosevelt's pursuit of a fourth term.
E) the issue of civil rights came to the fore as the dominant concern of the party.