Which of the Following Describes a Reason for the Recent

Which of the following describes a reason for the recent job growth in the service sector?

A) Large manufacturing firms seeking efficiency have contracted out an increasing number of services.
B) The Canadian economy has been growing over the past decade.
C) Offshoring has led to service industry.
D) the increasing interest in the environment has led to the creation of service oriented jobs.There has been little change in the number of jobs in the service sector in recent years,however employment is expected to increase rapidly.