单选题All the following factors are given as reasons for the annoyance of the private courier services EXCEPT.A lack of relations at customsB the monopoly of the post officeC no network of officesD the shortage of workers
题目
单选题
All the following factors are given as reasons for the annoyance of the private courier services EXCEPT.
A
lack of relations at customs
B
the monopoly of the post office
C
no network of offices
D
the shortage of workers