You are troubleshooting a site-to-site VPN issue where the tunnel is not establishing. After issuing the debug crypto ip

[answerhappygod]

You are troubleshooting a site-to-site VPN issue where the tunnel is not establishing. After issuing the debug crypto ipsec command on the headend router, you see the following output. What does this output suggest?
1d00h: IPSec (validate_proposal): transform proposal
(port 3, trans 2, hmac_alg 2) not supported
1d00h: ISAKMP (0:2) : atts not acceptable. Next payload is 0
1d00h: ISAKMP (0:2) SA not acceptable

A. Phase 1 policy does not match on both sides.
B. The Phase 2 transform set does not match on both sides.
C. ISAKMP is not enabled on the remote peer.
D. The crypto map is not applied on the remote peer.
E. The Phase 1 transform set does not match on both sides.