If a firm hires a currently unemployed​ worker, the opportunity cost of utilizing the​ worker's services is zero. This statement is A. false because the​ worker's new wages are an implicit cost. B. false because the​ worker's time otherwise spent in unpaid household work has value. C. true because the​ worker's time otherwise has no value. D. false because the​ worker's time otherwise spent in leisure activities has no value. E. true because the​ worker's new wages are a sunk cost.