The BGP routing table consists of the following network routes： What is the correct command to summarize these prefixes into a single summary prefix of192.168.12.0/22 while also allowing for the advertisement of the more specific prefixes？（）

• A、network 192.168.12.0 mask 255.255.252.0
• B、network 192.168.12.0 mask 0.0.3.255
• C、network 192.168.12.0
• D、aggregate-address 192.168.12.0 255.255.252.0
• E、aggregate-address 192.168.12.0 255.255.252.0 summary-only
• F、aggregate-address 192.168.12.0 255.255.252.0 as-set