Which Is Not a Likely Explanation as to Why Unemployment

Which is not a likely explanation as to why unemployment rates are higher in Europe than in the United States?

A) Most European countries offer more generous unemployment insurance benefits than in the United States.
B) Most European countries have stronger employment protection restrictions than in the United States.
C) There is more wage rigidity in Europe than in the United States.
D) Europeans are less productive than Americans.
E) Most European countries offer unemployment benefits for longer than they are available in the United States.