Unemployment Rates in Canada and the United States Have Been

Unemployment rates in Canada and the United States have been lower than those in Europe for many years.A generally accepted explanation for this trend is that

A) unions are more powerful in North America than in Europe.
B) social programs are more generous in North America than in Europe.
C) employment insurance programs are more generous in North America than in Europe.
D) firms are more risk averse in North America than in Europe.
E) labour-market flexibility is greater in North America than in Europe.