In the Solow Growth Model, When the Growth Rates of Capital

In the Solow growth model, when the growth rates of capital and labor are constant,

A) the capital labor ratio grows at a constant rate, too.
B) output per worker grows at the rate of growth of capital and labor combined.
C) output grows at the same rate as the capital-labor ratio.
D) the capital-labor ratio is constant.
E) none of the above is true.