(9) As the quantity of capital increases, the marginal product of capital

a)

is constant.

b)

increases.

c)

may either increase or decrease.

d)

decreases.

(10) The profit-maximizing quantity of labour equates the marginal product of labour with

a)

the average product of labour.

b)

the marginal product of capital.

c)

the real wage.

d)

total factor productivity.