Which of the Mlowing can best summarize the passage？
A:The reform. of postal services is un
选项：

A:Which of the Mlowing can best summarize the passage？
B:
A:The reform. of postal services is undergoing in Europe.
C:
B:Protectionism hampers the reform. of Europe's postal services.
D:
C:Monopolies of postal services are to be broken up.
E:
D:The European market of postal services is open to competition.