The user needs to connect their on-premises network to GCP using Cloud Interconnect but cannot meet at a Google POP and cannot run BGP. Direct Peering and Dedicated Interconnect are not viable options as they require physical connectivity to a Google POP and BGP configuration. Partner Interconnect with a layer 2 partner would still require the user to configure BGP, which is not feasible in this scenario. Therefore, Partner Interconnect with a layer 3 partner is the correct choice as the partner manages the BGP session with Google, and the user does not need to be at a Google POP.