Refer to the exhibit.

The customer’s ISL links are flapping and seem to go down every few days.
While troubleshooting the problem, they determine that the speed of failover to the redundant path
is taking too long. What is the recommended solution to the problem, involving turning on a
feature?

Exhibit:

A.
use port tracking

B.
disable the flapping ISL

C.
use port channel

D.
adjust FSPF link costs