well duh, they probably should've also made the "Power On" feature be on

Before implementing NetFlow on a router, IP routing has to be configured. This is because NetFlow is an IP traffic monitoring technology that needs IP routing to be enabled and properly set up to work correctly. NetFlow can be used to analyze and monitor IP traffic, and it needs information about the network topology to do that effectively. While syslog, VRF, and SNMPv3 are all important features in network management and monitoring, they are not requirements for implementing NetFlow.

Before implementing Netflow on a router, we should first get a router

B. NetFlow requires IP routing to be configured on a router because it is used to monitor and analyze the IP traffic moving through the router. IP routing has to be enabled so the router can forward packets and so NetFlow can collect information about those packets. Without IP routing, the router would not be able to forward packets, and there would therefore be no packets for NetFlow to gather information from.

Answer 'B': https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/netflow/configuration/15-mt/nf-15-mt-book/get-start-cfg-nflow.html

B. IP routing