American Unemployment Was Lower Than Most European Nations in the Last

American unemployment was lower than most European nations in the last decade because

A) the U.S.experienced a booming economy throughout the 1990s while European economies were stagnant.
B) in Europe there is no longer much of a stigma attached with being unemployed.
C) unemployment benefits are much more generous in Europe than in the U.S.
D) All of the choices are correct.