Unlike Those in the United States, Interest Groups Have Remained

Unlike those in the United States, interest groups have remained weak in Europe because

A) the political systems in Europe are more decentralized.
B) interest groups are outlawed in many countries owing to their corruptive influence.
C) political parties have stayed strong in Europe.
D) European countries are less industrialized, with fewer labor unions and corporations.
E) parliamentary systems are winner-take-all oriented.