Which of the Following Is a Reason That Americans Are

Which of the following is a reason that Americans are more likely to work for a political campaign than are citizens in Europe?

A) America's federal system provides more campaign opportunities.
B) European candidates seldom need campaign workers.
C) Americans have more leisure time than Europeans.
D) U) S.candidates pay campaign workers,whereas European candidates do not.
E) Laws in some U.S.communities require citizens to participate in campaigns.