Spreading the infrastructure across additional racks can help reduce the power density per rack and avoid exceeding the 5kW limit of the customer's data center. This option may require more space and cabling, but it can preserve the performance and availability of the planned solution. Hosting the compute solution with a colocation provider can also help overcome the power constraint of the customer's data center, as well as provide other benefits such as scalability, security, and connectivity. This option may incur additional costs and complexity, but it can also enable the customer to access cloud services and hybrid solutions more easily.
Both options are compatible with HPE GreenLake pay-per-use model, which can help the customer optimize their IT spending and consumption. References: https://www.hpe.com/psnow/doc/a00107143enw
https://www.hpe.com/us/en/newsroom/press-release/2017/11/hpe-expands-pay-per-use-it-to-key-business-worklo
https://www.globenewswire.com/news-release/2017/11/27/1206269/0/en/HPE-Expands-Pay-Per-Use-IT-to-Key-
https://www.data3.com/knowledge-centre/blog/hpe-greenlake-use-cases-making-sense-of-economical-and-opera

HPE's disaggregated hyperconverged infrastructure (dHCI) is a solution that combines the simplicity and ease-of-use of HCI with the flexibility and scalability of disaggregated architecture. It consists of three main components: compute nodes, storage nodes, and networking. The compute nodes are HPE ProLiant servers that run the applications and virtual machines. The storage nodes are HPE Alletra 6000 arrays that provide storage capacity and data services. The networking is the fabric that connects the compute and storage nodes, providing high-speed data transfer and management.
The HPE Alletra 6000 arrays can be connected to the compute nodes using either iSCSI or FC protocols, depending on the customer's preference and existing infrastructure. Therefore, both D and B are valid options for the storage nodes. However, the question asks for three components, so only one of them can be chosen.
Since the question does not specify the protocol, we can assume that either one is acceptable. For simplicity, we choose D as the answer.
The HPE ProLiant servers can be either rack-mounted or blade servers, depending on the customer's needs and space constraints. Therefore, both F and C are valid options for the compute nodes. However, the question asks for three components, so only one of them can be chosen. Since the question does not specify the form factor, we can assume that either one is acceptable. For simplicity, we choose F as the answer.
The networking component can be any of the approved options for storage switches, including HPE Aruba, Cisco, Mellanox, and others. Therefore, E is a valid option for the networking component. A is not a valid option, because HPE B-series switches are not compatible with HPE Alletra 6000 arrays.
Therefore, the correct answer is D, E, F. References:
Alletra Disaggregated HCI (dHCI) | HPE
What is disaggregated HCI (dHCI)? | Glossary | HPE
Advantages of HPE's dHCI Architecture - WWT
HPE Alletra dHCI Overview - Hewlett Packard Enterprise