You recently deployed a new version of an application to App Engine and then discovered a bug in the release. You need to immediately revert to the prior versio...

You recently deployed a new version of an application to App Engine and then discovered a bug in the release. You need to immediately revert to the prior version of the application. What should you do?

A. Run gcloud app restore. B. On the App Engine page of the GCP Console, select the application that needs to be reverted and click Revert. C. On the App Engine Versions page of the GCP Console, route 100% of the traffic to the previous version. D. Deploy the original version as a separate application. Then go to App Engine settings and split traffic between applications so that the original version serves 100% of the requests.