All of the Output of Industry X Is Made in America.Suppose

All of the output of industry X is made in America.Suppose now that a foreign nation's workers can produce at least part of industry X's good at a lower wage.The reduction in American jobs in industry X will be smaller when

A) American workers, while getting a wage twice that of foreigners, are 50% more productive.
B) the supply of labor supply is highly elastic.
C) the elasticity of supply of American workers is more inelastic.
D) American workers are excellent substitutes for foreign workers.