Which three statements are true about EIGRP route summarization?（）
- AWhen manual summarization is configured, the router immediately creates a route that points to null0 interface
- BManual route summarization is configured in router configuration mode when the router is configured for EIGRP routing
- CManual route summarization is configured on the interface
- DThe ip summary - address eigrp command generates a default route with an administrative distance of 5
- EWhen manual summarization is configured, the summary route will use the metric of the largest specific metric of the summary routes
- FThe ip summary - address eigrp command generates a default route with an administrative distance of 90