Labor Force Productivity Has Increased from $30 Per Hour to $32

Multiple Choice

Labor force productivity has increased from $30 per hour to $32 per hour over the past year.This could result from

A) only an increase in real GDP.
B) an increase in real GDP with no change in the aggregate hours or a decrease in aggregate hours with no change in real GDP.
C) only a decrease in aggregate hours.
D) an increase in the labor force participation rate.
E) an increase in population.