问题：

[多选] Select the two answers that best describe the IP Event Dampening feature（）

A . The IP Event Dampening uses exponential decay mechanism to suppress the effects of excessive interface flapping
B . BGP Operators use IP Event Dampening to suppress the effect of unstable internet Routes
C . The IP Event Dampening works with routing protocols by stopping the announcement of dampened interface subnets in their updates
D . When IP Event Dampened internet routes resch their re-use limit BGP installs them in the Routing Table and announces them to other BGP speaker