quEstions 153-154 rEFEr to thE Following mEmo. mEmo to:All EmployEEs From: jAnE mCkinlEy DAtE: monDAy, 29 mArCh 2007 suBjECt:ComputEr mAintEnAnCE wE will BE pErForming routinE mAintEnAnCE on thE ComputEr systEm this FriDAy, mArCh 2, stArting At 6A、m. wE will BE rEstArting thE mAin ComputEr, whiCh will rEsult in A BriEF loss oF sErviCEs At somE points During thE onE-hour mAintEnAnCE. A、BriEF mEssAgE will AppEAr on sCrEEn FivE minutEs BEForE thE mAintEnAnCE oCCurs. it instruCts ComputEr usErs to sAvE All DAtA AnD Exit All progrAms.AFtEr thE mAintEnAnCE is ComplEtED, usErs mAy rEsumE working. ACCorDing to thE mEmo, whAt shoulD ComputEr usErs Do whEn thE mEssAgE AppEArs on sCrEEn A、sEnD An E-mAil to thE ComputEr hElp DEsk B、sAvE thEir CurrEnt work C、rEstArt thEir ComputErs D、turn oFF thEir ComputErs