Which statement applies to Flexible NetFlow?

A.
Flexible NetFlow uses seven key fields in IP datagrams to identify the flow.

B.
Flexible NetFlow uses key fields of IP datagram to identify fields from which data is
captured.

C.
User-defined flows can be defined in Flexible NetFlow.

D.
Flexible NetFlow cannot be used for billing and accounting applications.

E.
Flexible NetFlow does not have any predefined records.