The Slope of the Wage-Safety Locus Gives

The slope of the wage-safety locus gives:

A) The change in the wage premium that the labour market yields for differences in the degree of risk of the job.
B) The change in profitability that is associated with different combinations of wages and job safety.
C) The change in the wage premium that the labour market yields for differences in the preference of the workers.
D) The change in the wage premium that the labour market yields for differences in the salary of each worker.
E) The change in the wage premium that the market yields for differences in the safety standards of firms.