You are monitoring a service that uses n2-standard-2 Compute Engine instances that serve large files. Users have reported that downloads are slow. Your Cloud Monitoring dashboard shows that your VMs are running at peak network throughput. You want to improve the network throughput performance. What should you do?

A. Add additional network interface controllers (NICs) to your VMs. B. Deploy a Cloud NAT gateway and attach the gateway to the subnet of the VMs. C. Change the machine type for your VMs to n2-standard-8. D. Deploy the Ops Agent to export additional monitoring metrics.