D & E are correct.
A : If the organization already has an on-premises infrastructure, why change ?
B : High availability and Disaster recovery can be achieved without Cloud implementation, you can do that with on-premises
C : In that usecase, Cloud implementation is your last option
D : Yes. Cloud implementation impact OpEx budget, not CapEx
E : Yes. This is the main interest of Cloud implementation : a fast scale-out and scale-up without waiting months to buy now servers
My vote goes to B and D because of the scale-up term used.
For growth in other geographical locations, you would use the term "scale-out".
Scale-up, also known as vertical scaling, refers to the process of adding more resources to a single system to improve its processing capability.
Scale-out, or horizontal scaling, on the other hand, involves adding more systems to your infrastructure. Continuing with the server example, instead of improving the existing server, you would add more servers to the network to help handle the workload.
I think the answer is correct; however, i would also think that B is correct. During a DR even the organization may want to temporarily move VDI to the cloud to restore some operation.
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