Between1970and1980,energyconsumptionbyUnitedStatesindustrypeakedandthendeclined,sothatby1980totalindustrialuseofenergywasbelowthe1970leveleventhoughtotalindustrialoutputhadgrownsubstantiallyinthesameperiod.Industrymusthaveinstitutedhighlyeffectiveenergyconservationmeasuresinthoseyearstohaveachievedsuchimpressiveresults.examｗ

Whichofthefollowing,iftrue,mostseriouslyweakenstheconclusionoftheargument?

(A)Manyindustriesswitchedtothegreatestextentpossiblefromhigh-pricedoiltolower-pricedalternativesthroughoutthe1970s.

(B)TotalresidentialenergyconsumptionwashigherintheUnitedStatesin1980thanithadbeenin1970

(C)Manyindustrialusersofenergyhadpaidlittleattentiontoenergyconservationpriorto1970.

(D)Industrialoutputgrewlessrapidlyfrom1970to1980thanithadfrom1960to1970.

(E)Theindustrieswhoseproductiondroppedsharplyduringthe1970sincludedadisproportionatelylargenumberofenergy-intensiveindustries.