Germanpeoplepreferextensivegreenr
问题：
[单选,材料题]Germanpeoplepreferextensivegreenroofsystemstointensiveones.回答下面的题目:
GreenRoofResearch
Theconceptofgreenroofsisbasicallyaboutgrowingplantsonroofs,thushelpingtoreplacethegreenfootprintthathadbeendestroyedduetotheconstructionofthebuilding.Greenroofsarethemostprevalent(流行)inGermany,whichiswidelyregardedastheleaderingreenroofresearch.
Thegreenroofsthatareusedthesedayscanbeclassifiedas"extensive"and"intensive"systems.Extensivegreenroofsusemosses,grassesandherbs,whicharetoleranttodroughts.Theseplantsdonotneedmuchmaintenance,canbegrowninalayerofsubstrate(土层)thatcanbeasshallowas1.5inches,andgenerallyareinaccessibletothepublic.Incontrast,awiderangeofspeciesofplantsaregrownonintensivegreenroofs,suchasshrubs(灌木)andeventrees,whichrequiredeepersubstratelayers,andareusuallygrownonflatroofs.Theyneedintensivemaintenance,andareusuallyareasthatresembleparkswhichareaccessibletopeople.
Thereareseveralbenefitsofadoptinggreenrooftechnologies.Apartfromtheobviouspsychologicalandaesthetic(美学的)benefitsofgarden-likeenvironmentssurroundingyou,someofthecommoneconomicandecologicalbenefitsare:areductionintheconsumptionofenergy;airandwaterpurification;recoveringgreenspaces;andthemitigation(缓解)oftheheatislandeffectinurbanareas.
Thegreenroofresearchthatiscurrentlyongoingisfocusedonevaluatingthespeciesofplantsthataresuitabletobegrownonroofs,themethodsofpropagation(繁殖)aswellasestablishment,nutrient(养料)andwaterrequirement,substrates,andthequantityandqualityofwaterrunoff.Theevaluationcriteriaofplantspeciesare:atwhatratetheycanbeestablishedtheircapacitytowithstandinvasiveweeds;toleranceofcoldandheat;toleranceofdroughtconditions;capacityofpersistenceandsurvival.
Anumberofexperimentsarebeingconductedonroofplatformsimulationsatvariousresearchcenters.Thesesitesaregenerallyoutfittedwithequipment,whichareusedtomeasuretemperaturesatdifferentdepthsofthegrowingsubstrates,andtherateandvolumeoftherunoffofstormwatersfromeachoftheplatforms.
Greenrooftechnologyisrepresentativeofacompletelynewmarketforlandscapecontractors,andallroofsthatcurrentlyexistandthefutureonestobeconstructedarethepotentialmarket-amarketthatistoohugetobeoverlooked.
Itisestimatedthataround10percentoftheflatroofsinGermanyaregreen.
A.Right
B.Wrong
C.Notmentioned
参考答案：C
参考解析：
【解析】题意为：相比于“密集型”屋顶绿化，德国人更偏爱“粗放型”绿化模式。本文第二段解释了“extensivegreenroof”和“intensivegreenroof”的含义，但并没有提到德国人更偏爱extensivegreenroof。
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