When troubleshooting redundant interface operations on the Cisco ASA, which configuration should be verified?

When troubleshooting redundant interface operations on the Cisco ASA, which configuration should be verified?

A.
The nameif configuration on the member physical interfaces are identical.

B.
The MAC address configuration on the member physical interfaces are identical.

C.
The active interface is sending periodic hellos to the standby interface.

D.
The IP address configuration on the logical redundant interface is correct.

E.
The duplex and speed configuration on the logical redundant interface are correct.