Final answer:
The statement that illustrates negotiation is 'A. If you end practice early, I will give you 10 dollars,' as it involves a clear proposal of exchange and compromise between Liam and his coach.
Step-by-step explanation:
The statement that MOST accurately demonstrates the idea of negotiation is A. 'If you end practice early, I will give you 10 dollars.' This proposal illustrates a clear give-and-take scenario where Liam is offering something of value to the coach in exchange for a change in practice timing, which is the essence of negotiation. It's about reaching an agreement where both parties have something to gain.
As for the other statements, they either ask for clarification (C, D) or state a belief (B), which do not represent the process of negotiation. When negotiating, the involved parties discuss and modify their positions with the aim of finding a mutually acceptable solution, often involving some form of compromise or exchange.