VM instances have only private IPs and need Cloud Storage access. All VM traffic must be routed back to on‑prem via Cloud Interconnect for scrubbing, but VM traffic to Google APIs should remain in the VPC. What should you do?

The correct solution ensures all non-Google API traffic is routed through on-prem, while Google API traffic remains within Google Cloud. Deleting the default VPC route and advertising 0.0.0.0/0 from on-prem via BGP forces all internet-bound traffic (except explicitly routed Google API traffic) back to on-prem for scrubbing. Using Private Google Access via private.googleapis.com (199.36.153.8/30) and a corresponding static route with the default internet gateway as the next hop allows VMs with only private IPs to reach Google APIs directly within Google's network, bypassing on-prem. The other options are incorrect because they either use restricted.googleapis.com (which is for VMs with external IPs), use a public Cloud DNS zone, or incorrectly prioritize routes, failing to meet the requirement for all non-Google API traffic to go through on-prem.