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