Suppose that a union successfully negotiated a 10 percent wage increase and the quantity of labor demanded increased by 10 percent.We can conclude that:

A) the labor demand curve must have independently shifted to the right.
B) labor demand is highly elastic.
C) the coefficient of labor demand elasticity is less than 1.
D) labor demand is unit-elastic.

If the wage increase caused an increase in the quantity demanded of labor, then it indicates that the demand curve for labor must have shifted to the right. This could be due to various reasons such as an increase in demand for the output produced or an increase in the productivity of workers. The other answer choices do not necessarily follow from the given information.