If the interest rate goes up, what happens to the investment demand curve?

The tradeoffs between rates of employment and inflation during the 1970s and 1980s forced economists to reassess their earlier beliefs about the Phillips curve to conclude that

a. the Phillips curve was upward sloping, not downward sloping as imagined b. rather than there being one Phillips curve, there is a set of such curves c. the expected trade-offs did not occur, meaning that policy to lower unemployment rates would not cause inflation d. the aggregate supply curve was a horizontal-vertical (two sides of a right angle) curve, as Keynesians believed e. the aggregate supply curve actually sloped downward because price levels fell whenreal GDP rose

(Last Word) Because there are so many sources of carbon dioxide, making monitoring difficult and costly, many economists:

A. prefer a carbon tax to cap-and-trade for reducing carbon dioxide emissions. B. prefer cap-and-trade to a carbon tax for reducing carbon dioxide emissions. C. believe that cap-and-trade and a carbon tax are both costly but should be implemented to reduce carbon dioxide emissions. D. believe that neither cap-and-trade nor carbon taxes can effectively reduce carbon dioxide emissions.