Your App Engine standard configuration is as follows:
service: production
instance_class: B1
You want to limit the application to 5 instances.
Which code snippet should you include in your configuration?

A. manual_scaling: instances: 5 min_pending_latency: 30ms B. manual_scaling: max_instances: 5 idle_timeout: 10m C. basic_scaling: instances: 5 min_pending_latency: 30ms D. basic_scaling: max_instances: 5 idle_timeout: 10m