R1 in ASN 1 with loopback1 address 1.1.1.1 needs to be configured with an iBGP connection to R2 with loopback2 IP address 2.2.2.2. The connection should use the loopbacks. Which o f the following commands is required on R1?（）

• A、neighbor 1.1.1.1 remote- as 1
• B、neighbor 2.2.2.2 remote- as 2
• C、neighbor 2.2.2.2 update - source loopback1
• D、neighbor 2.2.2.2 ibgp -multihop 2
• E、neighbor 2.2.2.2 ibgp - mode