which of the following represents an increase in labor productivity within a country? GDP increased from 200 billion dollars to 400 billion dollars while total labor hours increased from 50 million to 100 milion? GDP decreased from 400 billion dollars to 200 billion dollars, while total labor hours decreased from 100 million to 50 million? GDP decreased from 400 billion dollars to 200 billion dollars to 200 billion dollars while total labor hours decreased from 75 million to 50 million? DGP increased from 200 billion dollars to 400 billion dollars, while laboe hours increased from 50 million to 75 million?