How Is Service Work Different from Manufacturing Work

How is service work different from manufacturing work?

A) Ever since the Information Revolution, service jobs have become much less common than manufacturing jobs.
B) Service workers are much less likely than manufacturing workers to be scrutinized by a supervisor.
C) In service work, unlike manufacturing work, it is common for workers' expectations to conflict with those of customers.
D) There is no difference between service work and manufacturing work.
E) Service work is much better paid than manufacturing work.