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