What country is a command economy may have huge accumulations of goods that no one wants while other products are short supply?why does this situation seldom happen?

A-competition eliminates shortages and surpluses by setting a market-clearing price

B-firms and consumers in markey economies are smarter than those in command economies

C-command economies intentionally plan to produce surpluses, but the shortages are accidents,

D-market economies are usually democracies where politicians must help to eliminate shortages and surpluses