The Failure of the Centrally-Planned Economies Was Exemplified by All $\underline { \text { except } }$

The failure of the centrally-planned economies was exemplified by all of the following $\underline { \text { except } }$

A) Interest rates that were below free-market levels
B) Consumer and producer goods of inferior quality
C) Declining rates of economic growth
D) Shortages of essential goods and services