A high average level of rear income per head is always associated with a high proportion of the working population engaged in __________ sector.

A high average level of rear income per head is always associated with

1.	A high average level of rear income per head is always associated with a high proportion of the working population engaged in __________ sector.
A.	Primary
B.	Secondary
C.	Tertiary
D.	None of the above
Answer» D. None of the above