To meet the requirements for configuring Cisco NX-OS REST API on a Cisco 9000 Series Switch, the correct configuration set is option B. This set of commands enables the NX-API feature, sets the NX-API to listen for HTTP traffic on TCP port 83, uploads the HTTPS certificate, and then enables the certificate. The inclusion of the nxapi certificate enable command is crucial as it activates the uploaded certificate, which is necessary for establishing secure HTTPS connections. References: The configuration guidelines are based on the Cisco Nexus 9000 Series NX-OS Programmability Guide, which details the steps for enabling and configuring NX-API REST and DME database on Cisco Nexus switches1.