Labour Productivity Will Increase If the ________ Increases and ________

Labour productivity will increase if the ________ increases and ________.

A) quantity of capital per hour worked; technology improves
B) quantity of labour per unit of capital; technology improves
C) quantity of capital per hour worked; immigration increases while capital is fixed
D) quantity of labour per unit of capital; immigration increases while capital is fixed
E) quantity of labour in the economy; capital depreciates more quickly