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V.Readtheparagraphanddecideonthebestchoice.Californiahasbeenfacingadroughtformanyyearsnow,withcertainareasevenhavingtopumpfreshwaterhundredsofmilestotheirdistributionsystem.Theproblemisgrowingasthepopulationofthestatecontinuestoexpand.Newresearchhasfounddeepwaterreservesunderthestatewhichcouldhelpsolvetheirdroughtcrisis.Previousdrillingofwellscouldonlyreachdepthsof1,000feet,butduetonewpumpingpractices,waterdeeperthanthiscanbeextracted(抽取).TheteamatStanfordinvestigatedtheaquifers(地下蓄水层)belowthisdepthandfoundthatreservesmaybetriplewhatwaspreviouslythought.HowcouldCalifornia’sdroughtcrisisbesolvedaccordingtosomeresearchers?

题型：单选题

选项

A. By building more reserves of groundwater.

B. By drawing water from the depths of the earth.

C. By developing more advanced drilling devices.

D. By upgrading its water distribution system.

正确答案：B