Which Measure Was Successful in 2009 in Putting an End

Multiple Choice

Which measure was successful in 2009 in putting an end to Zimbabwean hyperinflation

A) the Zimbabwean dollar was devalued by more than half
B) the old Zimbabwean dollar was replaced by the new Zimbabwean dollar, which had fewer zeros printed on it
C) the U.S. dollar and the South African rand were substituted for the Zimbabwean dollar as a medium of exchange
D) money was eliminated in favor of a barter economy
E) none of the above