In troubleshooting an X.25 communications link, what is the SCF command to switch line $X251 to
the second port on the same CLIP?

A.
ALTER LINE $X251,PORT 2

B.
ALTER DEVICE $ZZWAN.#X251,PORT 2

C.
ALTER DEVICE $ZZWAN.#X251,LINE 1

D.
ALTER LINE $X251,LINE 1