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

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

B.
It allows multiple VSANs to share a common interface to another physical switch

C.
It allows for the separation of VSAN traffic across one or more line cards

D.
It associates two or more IP ports within a Cisco switch or director for failover purposes