User need low network lateicny connections to RDS and the application that is hosted on$-$primise. They tried hosting the RDS $($with gp$2)$ in the same region as the on$-$premise data center but not happy with the latency. What can be the best architectural design to fulfill this use case?

$-$ Up$-$scale instance class

$-$ site to site VPN

$-$ RDS Outpost

$-$ Migrate the storage to Io$1$