Which of the following explains why employment only rises at a slow pace at the end of a recession? A. Discouraged workers leave the labor force and this makes the unemployment rate rise. B. Firms are hesitant to rehire laid off workers as they continue to operate below capacity. C. Firms rapidly hire new workers at the first sign of on an increase in demand for their goods. D. Discouraged workers return to the labor force and this makes the unemployment rate fall.