Which two characteristics of the underlying physical network does VMware NSX require for robust IP transport? (Choose tw

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Which two characteristics of the underlying physical network does VMware NSX require for robust IP transport? (Choose two.)

A. The physical network should provide scalable network I/O using Layer 2 Multipathing (L2MP) and Multichassis Link Aggregation (MLAG).
B. The physical network should provide scalable network I/O using Equal Cost Multipathing (ECMP).
C. QoS is not necessary since classification and marking will be done in the overlay.
D. QoS classification and marking is required to provide end-to-end flow control.