D.
Because the author can show how characters change (A), but they need to show how the characters acted before the change (C). And B is just what explains the character.
Answer:
Germany invading Poland on September 1, 1939, and Britain and France declaring war on Germany on September 3, 1939. Problems arose in Weimar Germany that experienced strong currents of revanchism after the Treaty of Versailles that concluded its defeat in World War I in 1918.:
Congress(house of representatives and the senate put together)