单项选择题
A.CR SPAPREM B.CR SPAPLOC C.CR SPCLGPA D.CR SPCAREA E.CR SPTT
A.DPC=own，user=SCCP，routingindicator=0. B.DPC=foreign，user=SCCP，routingindicator=0. C.DPC=own，user=ISUP，messagetype=0. D.DPC=own，user=SCCP，routingindicator=1.
A.TCP B.ISUP C.INAP D.CAP