YourDomain.com has installed these components:
Two Cisco Catalyst 6500 Series Switches
FWSM in each Catalyst 6500
Active/Active failover on FWSMs
4-Gbps trunk between the switches
Failover packets between the FWSMs must be transmitted in a timely fashion. What must be configured on the trunk?

A.
Separate link for VLAN failover

B.
QoS

C.
Stateful failover

D.
6-Gbps bandwidth