In 1948, Many Southern Democrats Split from the Party Because

In 1948, many southern Democrats split from the party because

A) the leftist Wallace progressives had gained power in the party.
B) they felt that Truman's weakness had "lost China" to the communists.
C) President Truman took a strong stand in favor of civil rights.
D) Truman refused to select a southern vice presidential candidate.
E) Truman appointed an ambassador to the Catholic Vatican.