You are migrating to Cloud DNS and want to import your BIND zone file. Which command should you use? 

Answer options:

A. gcloud dns record-sets import ZONE_FILE --zone MANAGED_ZONE 
B. gcloud dns record-sets import ZONE_FILE --replace-origin-ns --zone MANAGED_ZONE 
C. gcloud dns record-sets import ZONE_FILE --zone-file-format --zone MANAGED_ZONE
D. gcloud dns record-sets import ZONE_FILE --delete-all-existing --zone MANAGED ZONE

C

Once you have the exported file from your other provider, you can use the gcloud dns record-sets import command to import it into your managed zone. To import record-sets, you use the dns record-sets import command. The --zone-file-format flag tells importto expect a BIND zone formatted file. If you omit this flag, import expects a YAML-formatted records file. Reference: https://medium.com/@prashantapaudel/gcp-certification-series-2-4-planning-and-configuring-network-resources-8045ac2cc2ac