Which of the following is not among the first steps the textbook recommends be taken to reduce negative externalities?

Which statement is true?

A. The Federal Reserve buys nearly all its United States government securities directly from the Treasury. B. Open market operations are the buying and selling of United States government securities in the open market by the Federal Reserve. C. The least important policy tool used by the Federal Reserve to control the money supply is open market operations. D. None of the choices/statements are true.

Suppose it takes Dan 5 minutes to make a sandwich and 15 minutes to make a smoothie, and it takes Tracy 6 minutes to make a sandwich and 12 minutes to make a smoothie. Which of the following statements is correct?

A. Dan has the comparative advantage in sandwiches, but Tracy has the absolute advantage in sandwiches. B. Dan has the comparative and absolute advantage in sandwiches. C. Dan has the comparative advantage in smoothies, but Tracy has the absolute advantage in smoothies. D. Dan has the comparative and absolute advantage in smoothies.