If the current allocation of resources in the market for hammers is inefficient, then it must be the case that

A、producersurplusexceedsconsumersurplusinthemarketforhammers.;
B、consumersurplusexceedsproducersurplusinthemarketforhammers;
C、thesumofconsumersurplusandproducersurpluscouldbeincreasedbymovingtoadifferentallocationofresources.;
D、thecoststhatsellersofhammersareincurringcouldbereducedbymovingtoadifferentallocationofresources.