long-run economic growth in the united states is best measured using a. nominal gdp per capita, which has been trending strongly upwards over the past century. b. real gdp per capita, which has been trending strongly upwards over the past century. c. nominal gdp per capita, the values for which represent constant purchasing power. d. real gdp per capita, which has increased every single year over the past century.

Ascientist successfully predicts the outcome of an experiment. you watch carefully and know he didn't cheat. the scientist's success shows that: a) the scientist knows absolute truth about this experiment; success is not possible unless you know the truthb) the scientist was just lucky; no one ever knows what's going on, so successful predictions require luckc) the scientist may know the truth, or at least know something that is close to the truth, or the scientist may have gotten lucky this time; you can't be absolutely sured) the scientist really was cheating, even though you didn't see the cheating; no one can get things right, except by cheatinge) the scientist spent the night at a particular hotel chain and go a free breakfast, giving the scientist the ability to do amazing things