Which statement applies to trunking on B-Series switches?

A.
Trunking is more effecient than individual ISLs because it is less probable that congestion
will be experienced.

B.
Oversubsciption is impossible with trunking.

C.
Trunking increases the availability because an I/O is not interrupted, even if the master
ISL of a trunk fails.

D.
If one ISL of a trunk fails, the whole trunk fails.