On a vSS, how does teaming two or more physical network adapters provide load balancing when using the Load Balancing fe

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On a vSS, how does teaming two or more physical network adapters provide load balancing when using the Load Balancing feature Route based on the originating virtual port ID?

A. They physical network adapter is chosen by use of a round robin based algorithm for each additional virtual port in the port group that becomes active.
B. The physical network adapter is chosen by using the source IP address of the virtual machine and the destination IP address as variables in an algorithm.
C. The physical network adapter is chosen by using the source MAC address as a variable in an algorithm.
D. The physical network adapter is chosen based on the workloads from each port and the number of physical adapters.