When using NIC aggregation, which configuration is supported in a Dell PowerScale Gen 6 environment?

When using NIC aggregation, which configuration is supported in a Dell PowerScale Gen 6 environment?
A . ext-1 and ext-2 of node 1 aggregated together
B . ext-1 of node 1 and ext-2 of node 2 aggregated together
C . ext-agg of node 1 and ext-agg of node 2 aggregated together
D . ext-1 of node 1 and ext-1 of node 2 aggregated together

Answer: A