As a cloud network administrator, you have been tasked with defining ingress and egress access rules for microservices deployed as functions in Oracle Functions. In addition to defining some general access rules in the subnet's security list, you define more fine-grained rules for different functions using Oracle Cloud Infrastructure (OCI) Network Security Groups (NSGs). Once the NSGs are created, where should they be attached in order to apply to a specific deployed function? (Choose the best Answer.)