Economist: Government intervention in the free market in pursuit of socially desirable goals can affect supply and demand, thereby distorting prices. The ethics of such intervention is comparable to that of administering medicines. Most medicines have harmful as well as beneficial effects, so the use of a type of medicine is ethically justified only when its nonuse would be significantly more harmful than its use. Similarly, government intervention in the free market is justified only when it __. Which one of the following most logically completes the final sentence above? ["would do less damage than would result from the government's not intervening", 'provides a solution to some otherwise insoluble problem', 'would likely be approved of by the majority of the affected participants', 'is believed unlikely to significantly exacerbate any existing problems']