问题：

[多选] Which two statements about EIGRP are true？（）

A . EIGRP supports VLSM， route summarization， and routing update authentication.
B . If the feasible successor has a higher advertised distance than the successor route， it becomes the primary route.
C . Passive routes are in the process of being calculated by DUAL.
D . EIGRP exchanges full routing table information with neighboring routers with every update.
E . A query process is used to discover a replacement for a failed route if a feasible successor is not identified from the current routing information.