Which of the Following Is Correct

Which of the following is correct?

A) In the U.S. it is only among the least skilled and least experienced members of the labor force that minimum-wage laws cause unemployment. Unions may keep wages above their equilibrium level.
B) In the U.S. it is only among the least skilled and least experienced members of the labor force that minimum-wage laws cause unemployment. Unions cannot keep wages above their equilibrium level.
C) In the U.S. minimum-wage laws cause unemployment even for people with high skills and much experience. Unions may keep wages above their equilibrium level.
D) In the U.S. minimum-wage laws cause unemployment even for people with high skills and much experience. Unions cannot keep wages above their equilibrium level.