In the aftermath of the downturn in the early$1930$s$,$ private banks$\_\_\_\_\_\_\_\_\_\_\_\_$; between $1936$ and $1937$ the Fed raised the$\_\_\_\_\_\_\_\_\_,$ which$\_\_\_\_\_\_\_\_\_\_\_$ the Great Depression.

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Part $1$

A$.$

increased their holdings of excess$$ reserves; reserve$$ requirements; prolonged

B$.$

increased their holdings of risky$$ securities; risk assessment$$ parameters; shortened

C$.$

reduced their holdings of excess$$ reserves; discount$$ rate; shortened

D$.$

reduced their excess$$ reserves; reserve$$ requirements; prolonged