The correct commands for creating a GKE cluster and deploying YAML configuration files involve creating the cluster with gcloud container clusters create, fetching credentials with gcloud container clusters get-credentials, and applying the configurations with kubectl apply -f. The commands in options A and B fail because they incorrectly format the file names for kubectl apply. Option A uses a list format [deployment.yaml,service.yaml] which Kubernetes treats as literal filenames, and option B uses && as a separator, which is also treated as part of the filename. The other options correctly apply the configurations either by specifying files separately or using a comma as a separator.