题目内容：
QuestionsarebasedonthefollowingpassageArchitectureistheartorscienceofdesigningandconstructingbuildingswithdurablematerialsfollowingcertaincanons.
Historically,architecturehasfollowedasuccessionofrecognizablestylesthatmay,forexample,beidentifiedasGothic,Baroque,orNeo-Classical;orithasaspecificstyleassociatedwithaparticularculture,suchasGreek,Roman,orEgyptian.
Architecturalstyle,evenifitisacountryhouse,factory,hotel,airport,orreligiousbuilding,reflectsthevaluesaswellastheneedsofthesocietythatproducesit.However,itisgovernednot
onlybytasteandaestheticinterestbutalsobymanypracticalconsiderations.
Theavailabilityofsuitablematerialsiscloselylinkedtothedevelopmentofskillsandinfluenced
theshapesofbuildings.Carpentrydevelopedinareasoftheworldthatwerethicklyforested.Althoughithasbecomescarcer,timberremainsanimportantbuildingmaterial.
Inotherareas,stoneandmarblewerechosenforimportantmonumentsbecausetheyarefireproofanddurable.Stoneisalsoasculpturalmaterial;stonearchitecturewasoftenintegralwithstonesculpture.Theuseofstonehasdeclinedtodaybecauseanumberofothermaterials,suchasglass,steel,andconcretearemoreeconomicaltouseandassemble.
Inregionswherebothtimberandstonewerescarce,earthitselfwasusedasabuildingmaterial.
Mudorclaywascompactintowallsormadeintobricksthatweredriedinthesun.Later,brickswerebakedinkilns,whichgavethemgreaterdurability.
Buildingwithstonesorbricksiscalledmasonry.Theelementscoherethroughsheergravityortheuseofmortar.TheRomansfoundanaturalcementthat,combinedwithinsertsubstances,producedconcrete.Intheearly19thcenturyatrulywaterproofcement,thekeyingredientofmoderncement,wasdeveloped.So,itissaidthatRomansaregreatcontributortothedevelopmentof
architecture.Thewriterofthisarticledosenotmention_________. A．thestyleofthebuildings
B．thematerialsofthebuildings
C．theconceptofarchitecture
D．theareaswherestoneandtimberarerich
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答案解析：