How Did European Nations, Including Great Britain, Contribute to the Global

How did European nations, including Great Britain, contribute to the global economic crisis after Germany defaulted on its reparation payments to the Allies in the 1920s?

A) They abandoned the gold standard and devalued their currency relative to the dollar, thus making it more difficult for American businesses to sell their goods abroad.
B) They purchased greater amounts of American stocks, leading to a glut in the stock market and its eventual collapse.
C) They lowered or removed tariffs on American-made goods, thus reducing their prices and causing manufacturers to lose profits.
D) They increased their deposits in American banks, which devalued the American dollar's purchasing power abroad.