O Productivity has been growing quite a bit less since 2007 than in the prior decade. The reasons for this are so far unclear. O Productivity growth has been accelerating since 2007 as people lost their jobs and the remaining workers had to work harder. QUESTION 5 Janet Yellen in her speech refers to one or more uncertainties which affect the outlook for the US economy. Which of the following does she cite? 1) The reliance on domestic demand to fuel further U.S. growth. 2) Lower oil prices hurt both oil producers and consumers. 3) Low productivity growth might hurt U.S. growth. 4) Low growth abroad has hurt US exporters. 5) Low interest rates have hurt savers in the US economy. O 1 and 2 only. O 2 and 4 only. 1 , 2, and 3 only. O 1, 3, and 4 only. O All of the above. Click Save and Submit to save and submit. Click Save All Answers to save