Correct Answer: C
Option A is Incorrect. Cloud CDN is a content delivery network that helps serve content to the users from the nearest locations.
Option B is Incorrect. Cloud Interconnect provides a highly available, low latency connection to connect on-premises network and Google cloud network.
Option C is Correct. Cloud NAT (Network address translation) enables the applications in private instances to access the internet.
Option D is Incorrect. Traffic director helps in global load balancing deployment across multi-region virtual machine (VM) instances.
https://cloud.google.com/cdn
https://cloud.google.com/network-connectivity/docs/interconnect
https://cloud.google.com/nat
https://cloud.google.com/traffic-director