单项选择题

A.SELECTNVL"DATE",SYSDATE)FROMDUAL
B.SELECTCOALESCE(B,SYSDATE)FROMDUAL
C.SELECTCOALESCE("DATE",SYSDATE)FROM(SELECTNULLAS"DATEFROMDUAL)
D.SELECTNVL("DATE",260)FROM(SELECTNULLASDATEFROMDUAL)
E.SELECTCOALESCE("DATE",SYSDATE)FROMDUAL