The migration of JencoMart's application to Google Cloud Platform (GCP) is progressing too slowly. The infrastructure is shown in the diagram. You want to maximize throughput. What are three potential bottlenecks? (Choose three.)

A single VPN tunnel limits throughput due to encryption overhead and bandwidth constraints, making it a common bottleneck for large data transfers. Copy commands not optimized for long distances, such as cp instead of gsutil or rsync with appropriate tuning, can significantly reduce transfer speeds over high-latency networks. Complicated internet connectivity, including firewalls, proxies, or suboptimal routing between on-premises and GCP, introduces latency and reduces effective bandwidth, hindering throughput. Incorrect options: Google Cloud Storage tiers are designed for different access patterns and costs, but a specific tier itself doesn't inherently limit throughput for a migration task unless an extremely slow tier (e.g., Archive) is used for active data. Fewer VMs in GCP than on-premises machines might affect processing capacity but not necessarily the raw data transfer throughput itself, assuming the network path is the primary bottleneck. A separate storage layer outside the VMs is a common and often efficient architecture (e.g., using Cloud Storage or Filestore) and is not inherently unsuited for migration tasks.