What is the log file that shows the processes that participate in the tunnel initiation stage?

What is the log file that shows the processes that participate in the tunnel initiation stage?

A.
$FWDIR/log/ike.elg

B.
$FWDIR/log/vpnd.elg

C.
$FWDIR/log/ikev2.xmll

D.
$FWDIR/log/ike.xmll

Explanation: