You are trying to establish a VPN tunnel between two Security Gateways but fail. What initial steps will you make to troubleshoot the issue?

A. capture traffic on both tunnel members and collect debug of IKE and VPND daemon

B. capture traffic on both tunnel members and collect kernel debug for fw module with vm, crypt, conn and drop flags, then collect debug of IKE and VPND daemon

C. collect debug of IKE and VPND daemon and collect kernel debug for fw module with vm, crypt, conn and drop flags

D. capture traffic on both tunnel members and collect kernel debug for fw module with vm, crypt, conn and drop flags