Resource pooling refers to: A. The provider's computing resources are pooled to serve multiple consumers. Resource pooling in cloud computing refers to the practice of aggregating and sharing computing resources among multiple consumers or clients. The cloud service provider combines its computing resources, including servers, storage, and networking infrastructure, into a shared pool. These resources can then be dynamically allocated and reallocated based on the demands and needs of different consumers or applications. By pooling resources, the cloud provider can achieve higher utilization rates and optimize resource allocation, leading to improved efficiency and cost-effectiveness. Consumers benefit from this pooling by gaining access to scalable and on-demand computing resources without the need to manage and maintain their own dedicated infrastructure. Therefore, option A correctly describes resource pooling in cloud computing.