Which two statements about NetFlow support on Cisco IOS XR are true?

A.	Cisco IOS XR supports NetFlow version 9 export format only.
B.	NetFlow version 9 is a flexible and extensible means to carry NetFlow records from a network node to a collector.
C.	IP flow is based on a set of four parameters only (source IP address, destination IP address, source port, and destination port).
D.	A NetFlow flow is the bidirectional sequence of packets on a single interface.