The Federal Reserve's two main ________ are the money supply and the interest rate

Who gains from a law requiring people who want to enter the taxicab business to prove they are thoroughly competent, honest, and reliable before they can obtain a license?

A) Local people who use taxicabs frequently and regularly B) Local people who use taxicabs only occasionally C) Out-of-town visitors who use taxicabs D) Owners of taxicab licenses E) Potential owners and operators of taxicabs who are members of minority races

If the marginal total cost when moving from Option A to Option B is negative and the marginal total cost when moving from Option B to A is positive, which of the two options is better? What is the underlying principal behind the decision?

What will be an ideal response?