The IP multicast global configuration command ip pirn send - rp - announce IoopbackO scope 31 group - list 5 issued on multicast router RTA. What are the two results? （）
- A RTA will forward RP announcements provided they are within the scope of 31.
- B RTA will originate RP announcements with TTL s et to 31.
- C RTA will originate RP announcements for multicast groups that match access - list 5.
- D RTA will drop all RP announcements it receives if the TTL field is greater than 31.