G8A13:What is a link budget?

Direct answer summary (2023-2027 NCVEC pool)

The official correct answer for G8A13 is The sum of transmit power and antenna gains minus system losses as seen at the receiver.

The key fact is The sum of transmit power and antenna gains minus system losses as seen at the receiver. Match that fact to the exact condition in the question; the other choices describe a different rule, band, component, or operating situation.