In Solow's Model of Economic Growth, Suppose That S Represents $\frac{s k^{*}}{\left(s+d\right)}$

In Solow's model of economic growth, suppose that s represents the savings rate, z represents total factor productivity, k represents the level of capital per worker, and f(k) represents the per worker production function. Also suppose that n represents the population growth rate and d represents the depreciation rate of capital. The equilibrium level of capital per worker, k*, will satisfy the equation

A) szf(k*) = (n + d) k*.
B) szk* = (n + d) f(k*) .
C) nf(k*) = $\frac{s k^{*}}{\left(s+d\right) }$
D) f(k*) = k* $\frac{s}{(n+d) }$
E) f(k*) = (n + d) k*.