The correct answer is D. All of the mentioned.
Multi-tenancy, identity and access management, and virtualization are all essential elements in cloud computing.
Multi-tenancy is a cloud computing model in which multiple users share the same physical infrastructure, but each user’s data and applications are logically isolated from the others. This allows cloud providers to offer services at a lower cost than would be possible if each user had their own dedicated infrastructure.
Identity and access management (IAM) is a set of policies and technologies that control who has access to what resources in a cloud environment. IAM is essential for ensuring the security of cloud-based data and applications.
Virtualization is the process of creating a virtual version of a physical resource, such as a server, storage device, or network connection. Virtualization allows cloud providers to offer a wide range of services on a single physical infrastructure.
These three elements are essential for providing a secure, reliable, and scalable cloud computing environment.