Which EIGRP packet statement is true?（）

• A、Update packets route reliable change information only to the affected routers.
• B、Reply packets are multicast to IP address 224.0.0.10 using RTP.
• C、On high - speed links, hello packets are broadcast every 5 seconds for neighbor discovery.
• D、Reply packets are used to send routing updates.
• E、On low - speed links, hello packets are broa dcast every 15 seconds for neighbor discovery.