Which two actions occur during IKE Phase 1?

Which two actions occur during IKE Phase 1? (Choose two.)

A.
A secure channel is established between two peers.

B.
The proxy ID is used to identify which security association is referenced for the VPN.

C.
The Diffie-Hellman key exchange algorithm establishes a shared key for encryption.

D.
The security association is identified by a unique security parameter index value.