A company is deploying an application that processes large quantities of data in parallel. The company plans to use Amazon EC2 instances for the workload. The network architecture must be configurable to prevent groups of nodes from sharing the same underlying hardware. Which networking solution meets these requirements?

Running EC2 instances in a spread placement group ensures that each instance is placed on distinct underlying hardware. This minimizes the risk of simultaneous failures due to shared hardware and is ideal for applications requiring high availability and parallel processing, like the one described. Grouping EC2 instances in separate accounts does not guarantee they will run on separate underlying hardware; it's an organizational separation, not a physical one. Configuring EC2 instances with dedicated tenancy ensures they run on hardware dedicated to a single customer, but it doesn't guarantee instances within that customer's account are on separate hardware. Shared tenancy is the default and offers no guarantees of hardware separation.