You have a solution that runs on a five-node Azure Kubernetes Service (AKS) cluster. The cluster uses an N-series virtual machine. An Azure Batch AI process runs once a day and rarely on demand. You need to recommend a solution to maintain the cluster configuration when the cluster is not in use. The solution must not incur any compute costs. What should you include in the recommendation?
A. Downscale the cluster to one node
B. Downscale the cluster to zero nodes
C. Delete the cluster