As an economy recovers from a​ recession, the observed level of labor productivity tends to decline.​ Why? A. The marginal product of labor declines as new workers enter the expanding work force.
B. The total product increases during the​ recovery, but the number of workers declines.
C. The marginal product of labor increases at a slower rate than the decline in employment.
D. The total product remains the same during the​ recovery, but the number of workers declines.