At the start of the Great Depression, Black Tuesday occurred when
 (A) investors began to buy large numbers of stocks on margin
 (B) bankers responded to Black Th ursday by off ering loan and mortgage
 forgiveness
 (C) President Hoover declared a national bank holiday to stabilize the
 market
 (D) investors raced to sell their stock holdings
 (E) the Federal Reserve moved off the gold standard