The Demand for DVD's Increases. as a Result

The demand for DVD's increases. As a result,

A) the wage rate in the DVD industry increases and the quantity demanded of workers increases.
B) the wage rate in the DVD industry increases and the quantity supplied of workers increases.
C) the demand for labor increases and the supply of labor also increases, leaving wages unchanged.
D) the demand for labor increases, but since the supply curve of labor is perfectly elastic, the wage rate does not change.