If Labor Is 20 Percent of Total Costs in Industry

If labor is 20 percent of total costs in industry A and 70 percent in industry B, then other things equal, we would expect the elasticity of demand for labor to be

A) greater in industry A than in industry B.
B) greater in industry B than in industry A.
C) the same in both industries.
D) uncertain since no general relationship exists between cost shares and elasticities.