Economists have hypothesized that the widening gap between the wages of unskilled workers and skilled workers may be due to ?

A. decrease in the demand for unskilled workers because of increases in technology and increases in international trade
B. increase in the number of unskilled workers available due to immigration into the UK.
C. decrease in the demand for unskilled workers are more poorly educated
D. increase in the number of unskilled workers available because workers are more poorly educated

Which of the following statements regarding discrimination is true ?

A. The existence of a wage differential among groups is strong evidence of discrimination in the labour market
B. Discrimination can only persist in a competitive labour market it customers are willing to pay to maintain the discriminatory practice or the government requires discrimination
C. Bigoted employers are the main source of a persistent discriminatory wage differential in a competitive market
D. Discrimination cannot exist in a competitive labor market