Which statement describes ISL aggregation?

A.
Enables distribution of traffic over the combined bandwidth of two or more ISLs and increases availability

B.
Prevents unauthorized use of ISLs by combining them into a single security domain.

C.
Allows vendors to create more E_Ports in switch and limit their use for ISLs

D.
Mechanism by which one or more ISLs can be reserved for special situations when extra bandwidth is needed