Which statement about a none zero value for the load metric (k2) for EIGRP is true?（）

• A、A change in the load on an interface will cause EIGRP to recalculate the routing metrics and send a corresponding update out to each of its neighbors.
• B、EIGRP calculates interface load as a 5 - minute exponentially weighted average that is  updated every 5 minutes.
• C、EIGRP considers the load of an interface only when sending an update for some other reason.
• D、A change in the load on an interface will cause EIGRP to recalculate and update the administrative distance for all routes learne d on that interface.