Suppose that real GDP grew more in Country A than in Country B last year. Which of the following does this imply concerning productivity or standard of living?
Select one:
Country A's productivity must have grown faster than country B's.
Country A’s productivity must have been higher only if the population in the two countries grew at the same rate.
Country A must have a higher real GDP than Country B.
Country A must have a higher standard of living than country B.