In a Neoclassical Model of Growth,an Increase in the Capital-Labour

In a neoclassical model of growth,an increase in the capital-labour ratio

A) raises the amount of output each worker can produce for a given level of productivity.
B) raises the amount of output per worker that must be devoted to investment.
C) generates a trade-off between the higher output per worker and the higher investment per worker.
D) all of the above.