Which of the following explains how the government provides the optimal quantity of a public good? Multiple choice question. It compares the marginal benefit of an added unit of the good against the government's total cost of providing it. It compares the total benefit of an added unit of the good against the government's marginal cost of providing it. It compares the marginal benefit of an added unit of the good against the government's marginal cost of providing it. It compares the total benefit of an added unit of the good against the government's total cost of providing it