The premium on a college education increases when (a) the market dema

The premium on a college education increases when

(a) the market demand for knowledge and skilled workers decreases, and all else is held constant.
(b) the market supply of knowledge and skilled workers increases, and all else is held constant.
(c) the growth in the demand for knowledge and skilled workers outpaces the growth in supply.
(d) the growth in the supply of knowledge and skilled workers outpaces the growth in demand.

ANSWER

(c)