The question requires upgrading an EHR connection to support business-critical needs while maintaining existing network and security policies. The community discussion overwhelmingly supports option A (Add a new Dedicated Interconnect connection) with 100% consensus. Key reasons: 1) Dedicated Interconnect provides direct physical connections with high reliability (99.9% availability requires 2 interconnects), 2) Google documentation explicitly states it's not possible to upgrade from 10G to 100G on existing connections - a new 100G connection must be provisioned alongside the existing one, 3) Dedicated Interconnect maintains the same security policies and meets business-critical requirements. Option B is incorrect as bandwidth upgrades aren't possible on existing Dedicated Interconnect circuits. Option C (Cloud VPN) is less reliable and more complex. Option D (Carrier Peering) doesn't provide SLA guarantees and is not suitable for GCP connectivity.