Which of the following is not helpful to improving the industrial energy efficiency of industrial system with parallel industrial sectors

A、Toimprovetheenergyefficiencyofeachcomponentsector;
B、Toimprovetheenergyefficiencyofindustrialsectorswithlowerenergyefficiency;
C、Toreducetheenergyefficiencyofindustrialsectorswithlowerenergyefficiency;
D、Toincreasetheshareofsectorwithhigherenergyefficiencyinthetotalindustrialeconomy