A Review of the Trends in Labor Productivity Growth in the U.S.for

A review of the trends in labor productivity growth in the U.S.for the periods 1973-1995, 1995-2010, and 2010-2015 suggests which of the following patterns?

A) a persistently strong growth averaging about 2.5 percent per year throughout the three periods
B) an initial strong growth averaging 2.5 percent per year in the period 1973-1995, followed by weak growth in 1995-2010, and a sharp rise again in 2010-2015
C) an initial modest growth averaging 1.5 percent per year in 1973-1995, followed by much higher growth in 1995-2010, then a collapse to very slow growth in 2010-2015
D) a relatively steady and modest growth throughout all three periods, averaging about 1.5 percent