In the Kubernetes platform, which component is responsible for running containers?

etcd is a distributed key-value store used by Kubernetes to store all cluster data, not for running containers.

CRI-O is an implementation of the Kubernetes Container Runtime Interface (CRI), allowing the kubelet to launch and manage OCI-compatible containers on a node.

The cloud-controller-manager embeds cloud-specific control logic to integrate with cloud providers, not to run containers.

The kube-controller-manager runs various controllers that watch the API server for changes and manage different aspects of the cluster, but it does not directly run containers.