单项选择题

A.EachcomputerhasoneharddiskthathasthreevolumesnamedC,D,andE.Eachvolumeis4GBinsizeandhasapproximately1GBofavailablespace.Thetotalphysicalmemoryofeachcomputeris196MBinsize.ThepagingfileoneachcomputerislocatedondriveD.AusernamedAndreareportsthateveryday,onehouraftershestartsherWindowsXPProfessionalcomputer,thecomputerappearstoperformveryslowlyfor15seconds.Thisalwayshappensaftershereceivesanerrormessagestatingthatthesystemislowonvirtualmemory.YouwanttoimprovetheperformanceofAndrea‘scomputer.Youdonotwanttoinstalladditionalmemory.