Explanation: The use of subcontractors can add risk to the supply chain and should be considered; trusting the provider’s management of their vendors and suppliers (including subcontractors) is important to trusting the provider. Conversely, the customer is not likely to be allowed to review the physical design of the datacenter (or, indeed, even know the exact location of the datacenter) or the personnel security specifics for the provider’s staff. “Redundant uplink grafts” is a nonsense term used as a distractor.