In the specific recession years noted in the passage, it can be inferred that ______.

A．productivity rises at the same rate as growth of the labor force
B．productivity and labor force increase at a greater rate than output
C．output exceeds productivity
D．rate of economic growth is less than the number of man hours required

A．As productivity rises, a greater amount of labor per dollar of national product can be expected.
B．Unemployment falls when production expands faster than labor force.
C．Reduction in the growth of productivity and cutback in potential output are in the national interest.
D．The long-term rate of growth in our economy, if continued into the future, will eventually decrease our unemployment rate, all other factors remaining constant.