UsingOracleScheduleryouhavescheduledtwojobs，JOB_AandJOB_B，torunat9：00p.m.everyFriday.Youwantboththejobstouseasingleresourceplan，WEEKEND_PLAN.Whichtaskmusthavealreadybeenperformedtoenableyoutoachievethisobjective？（）

A.AwindowmusthavebeencreatedwiththeWEEKEND_PLANresourceplan.

B.AprogrammusthavebeencreatedwiththeWEEKEND_PLANresourceplan.

C.AjobclassmusthavebeencreatedwiththeWEEKEND_PLANresourceplan.

D.AwindowsgroupmusthavebeencreatedwiththeWEEKEND_PLANresourceplan.