What describes the SAS cabling when adding an expansion enclosure to a Dell EMC PowerStore, for each node and expansion enclosure side?

What describes the SAS cabling when adding an expansion enclosure to a Dell EMC PowerStore, for each node and expansion enclosure side?
A . SAS cabling goes from existing A ports to new ports. At the last enclosure, SAS cabling returns from the A ports to the originating node’s B ports
B . SAS cabling goes from existing A ports to new ports. At the last enclosure, SAS cabling returns from the A ports to the alternate node’s ports
C . SAS cabling goes from existing ports to new A ports. At the last enclosure, SAS cabling returns from the ports to the alternate node’s A ports
D . SAS cabling goes from existing ports to new A ports. At the last enclosure, SAS cabling returns from the ports to the originating node’s A ports

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Answer: B