The Great Depression is still the subject of controversy, including th

The Great Depression is still the subject of controversy, including the question(s) of

(a) what caused the initial downturn.
(b) why the economy contracted for so long (1929 to 1932) and why it contracted so much
(real GNP fell about 30%).
(c) whether government policy helped or hindered the recovery attempt.
(d) all of the above.

ANSWER

(d)