Between1970and1980,energyconsumptionbyUnitedStatesindustrypeakedandthendeclined,sothatby1980totalindustrialuseofenergywasbelowthe1970leveleventhoughtotalindustrialoutputhadgrownsubstantiallyinthesameperiod.Industrymusthaveinstitutedhighlyeffectiveenergyconservationmeasuresinthoseyearstohaveachievedsuchimpressiveresults.examｗ
Whichofthefollowing,iftrue,mostseriouslyweakenstheconclusionoftheargument?
(A)Manyindustriesswitchedtothegreatestextentpossiblefromhigh-pricedoiltolower-pricedalternativesthroughoutthe1970s.
(B)TotalresidentialenergyconsumptionwashigherintheUnitedStatesin1980thanithadbeenin1970
(C)Manyindustrialusersofenergyhadpaidlittleattentiontoenergyconservationpriorto1970.
(D)Industrialoutputgrewlessrapidlyfrom1970to1980thanithadfrom1960to1970.
(E)Theindustrieswhoseproductiondroppedsharplyduringthe1970sincludedadisproportionatelylargenumberofenergy-intensiveindustries.
