Which of the Following Was NOT a Cause of the Great

Which of the following was NOT a cause of the Great Depression?

A) Policy makers moved away from the gold standard.
B) Corporate structures had been bloated by the success of the 1920s but were unprepared for the tightening of the economy.
C) Andrew Mellon was overconfident in the power of market capitalism to right itself.
D) Much of the profit that had been taken during the 1920s had been put back into companies rather than saved or invested in other ways.
E) A decline in the public consumption of goods led to a lower rate of investment in new plants.