题目内容：
QuestionsarebasedonthefollowingpassageResearchershaveshownthatnoisecanadverselyaffecthumaninbothphysiologicalandpsychologicalways.Hearinglossesinparticularoccupationssuchasshipbuildingandconstructionworkarewell-known.Infact,however,weallfindhearingmoredifficultasweage.Youngearscandistinguishawiderangeofsoundsfromlowtoveryhighfrequencies,whileolderearslosetheabilitytodistinguishhigh-pitchedsounds.Acomparisonofpeoplelivinginsomeindustrializedandnon-industrializedareassuggeststhatthishearinglossmaynotnecessarilyaccompany
oldage.
Furthermore,acloserinspectionofotherdatarevealseconomiceffects.Forinstance,anincreasedturnoverinpropertyhasbeenobservedinnoisyareasnearairports.Jobperformancecanbeadverselyaffectedbyloudnoise,especiallyifaccuracyandmentaleffortareinvolved.Theuseofoutdoorareasforconversationisnotpossibleforanestimated5to10millionpeoplewholiveorworkinurbanareas.Wheninterferencewithtelevisionorspeechorsleepisincluded,asmanyas22to44millionpeoplecanbesaidtohavelostpartoftheuseoftheirhomesandgroundsbecauseofnoise.
Thusnoisepollutionisaseriousenvironmentalconcern.Theindifferentattitudetowardnoiseshouldbeovercome;considerableeffortsshouldbemadetoalertpeopletothegraveeffectsthatmaystemfromanexcessivelynoisyenvironment.Wecanlearnfromthispassagethat_______. A．youngpeoplearesensitivetohigh-pitchedsounds
B．youngpeopledistinguishlowfrequencynoisebetterthanoldpeople
C．highfrequencynoisecancausehearinglossinoldpeople
D．peopleinindustrializedareaswillsufferhearinglosswhentheyareold
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答案解析：