Refer to the exhibit. OSPF has been configured on all routers in the network and Area 1 has been configured as a NSSA. Which statement is true about the NSSA Area 1？（）

A.Only redistributed RIP routes will appear in Area 1. They will be advertised via t ype 7 LSAs

B.No redistributed routes can appear in Area 1, only summary routes

C.Redistributed RIP and IGRP routes will appear in Area 1. They will be advertised via type 5 LSAs

D.Only redistributed IGRP routes will appear in Area 1. They will be advertised via type 7 LSAs