YouworkasadatabaseadministratoratCertkiller.com.Inyourproductiondatabasethereisajob，CALC_STAT，whichhasbeenscheduledtoruneveryFridayat5.00p.m.CALC_STATupdatestheoptimizerstatisticsfortheobjectsownedbytheAPPSschema.Youwantthetasktobegeneric，therebyallowinguserstomodifytheattributesofthetaskatruntimewithoutaffectingtheoriginaltask.WhichcomponentofOracleSchedulermustyoudefinetoachievethis？（）

A.Window

B.Program

C.Jobclass

D.Windowgroup