What Is Polarization of the Job Market

What is polarization of the job market?

A) Employment growth for high-skilled workers and less growth or even declines in jobs for low-skilled workers.
B) Employment growth for low-skilled workers and less growth or even declines in jobs for high-skilled workers.
C) Employment growth for both high-skilled and low-skilled workers and less growth or even declines in jobs for mid-level workers.
D) Employment growth for high-skilled and mid-level workers and less growth or even declines in jobs for low-skilled workers.