What is a benefit of port channeling in MDS-series switches/directors?

A.
A method to associate two or more ports within aMcData switch or director for failover purpose

B.
Allows interoperability between Cisco andMcData Switches

C.
If one ISL fails, traffic previously carried on this link is switched to the remaining ISL

D.
A method to associate two or more ports within a Cisco switch or director for failover purpose