Vanwilligan: Some have argued that professional athletes receive unfairly high salaries. But in an unrestricted free market, such as the market these athletes compete in, salaries are determined by what someone else is willing to pay for their services. These athletes make enormous profits for their teams' owners, and that is why owners are willing to pay them extraordinary salaries. Thus the salaries they receive are fair. Vanwilligan's conclusion follows logically if which one of the following is assumed? ["If a professional athlete's salary is fair, then that salary is determined by what an individual is willing to pay for the athlete's services in an unrestricted free market.", 'The fairest economic system for a society is one in which the values of most goods and services are determined by the unrestricted free market.', 'If professional athletes were paid less for their services, then the teams for which they play would not make as much money.', 'Any salary that a team owner is willing to pay for the services of a professional athlete is a fair salary.']