What are two benefits of Flexible NetFlow records? (Choose two)

What are two benefits of Flexible NetFlow records? (Choose two)
A . They provide attack prevention by dropping the traffic.
B . They allow the user to configure flow information to perform customized traffic identification
C . They provide accounting and billing enhancements
D . They provide monitoring of a wider range of IP packet information from Layer 2 to 4.
E . They converge multiple accounting technologies into one accounting mechanism

Answer: B E