The production function $Y\frac{?}{b}=ar\frac{A}{b}ar(K{)}^{\frac{1}{3}}{L}^{\frac{2}{3}}$ describes how

can be combined to generate output.

a$.$ any amount of labor and a particular amount of capital

b$.$ particular amounts of capital and labor

c$.$ any amount of capital and labor

d$.$ any amount of capital and a particular amount of labor

e$.$ negative total factor productivity