Comparing a uniform abatement policy, pollution tax and a command-and-control policy, which one the is most efficient approach in dealing with pollution?

The Laffer curve is a curve showing

A) output as a function of the tax rate. B) tax revenue as a function of the tax rate. C) government expenses as a function of how liberal the government is. D) the tax rate as a function of government expenses.

The only reason paper currency (e.g., the dollar bill) is accepted as money in the United States today is because it is backed by gold

Indicate whether the statement is true or false