A) the ability to automatically or rapidly add and remove resources as demand changes
B) an architecture in which a shared service securely serves multiple customers or tenants
C) Platform as a Service, providing a managed platform for developing and deploying applications
D) the ability of a system to handle increased or decreased workload by adjusting resources
Answer: D
Explanation: Scalability means the ability of a system to handle increased or decreased workload by adjusting resources. The other options describe different concepts from this topic.