GRE逻辑题,Between1970and1980,energyconsumptionbyUnitedStatesindustrypeakedandthendeclined,sothatby1980totalindustrialuseofenergywasbelowthe1970leveleventhoughtotalindustrialoutputhadgrownsubstantiallyinthesameperio

　　GRE逻辑题,

　　Between1970and1980,energyconsumptionby

　　UnitedStatesindustrypeakedandthendeclined,so

　　thatby1980totalindustrialuseofenergywasbelow

　　the1970leveleventhoughtotalindustrialoutput

　　hadgrownsubstantiallyinthesameperiod.Industry

　　musthaveinstitutedhighlyeffectiveenergyconser-

　　vationmeasuresinthoseyearstohaveachievedsuch

　　impressiveresults.

　　Whichofthefollowing,iftrue,mostseriouslyweak-

　　enstheconclusionoftheargument?

　　(A)Manyindustriesswitchedtothegreatestextent

　　possiblefromhigh-pricedoiltolower-priced

　　alternativesthroughoutthe1970's.

　　(B)Totalresidentialenergyconsumptionwashigher

　　intheUnitedStatesin1980thanithadbeen

　　in1970

　　(C)Manyindustrialusersofenergyhadpaidlittle

　　attentiontoenergyconservationpriorto1970.

　　(D)Industrialoutputgrewlessrapidlyfrom1970to

　　1980thanithadfrom1960to1970.

　　(E)Theindustrieswhoseproductiondroppedsharply

　　duringthe1970'sincludedadisproportionately

　　largenumberofenergy-intensiveindustries.