Which of the following are steps to configure destination-based Remote Triggered Black Hole（RTBH）filtering？（）

• A、Configure OSPF between trigger router and black hole routes
• B、Configure all edge routers with static （reserved） host route to Null0
• C、Configure BGP beteen trigger and black hole routers
• D、Configure on trigger router to advertise victim host route with commumity
• E、Activate black hole by redistributing route for victim into BGP with next-hop set to the static（reserved）host route configured on edge routers