Which of the Following Would NOT Slow Down Productivity Growth

Multiple Choice

Which of the following would NOT slow down productivity growth?  

A)  if the composition of the work force changes such that more young people are working but fewer middle-aged people are working 
B)  if the composition of the work force changes such that more women are included 
C)  if the quality of education decreases 
D)  if firms switch from providing services to producing goods