Occupational Distribution Of Population

[chikis]

Homework Statement

Help! I just came across this question:
A review of occupational distribution of population from time to time help help us to know the A. rate at which the population grows B. number of people that make up the labour force C. effciency of the working population D. industries which are becoming less important E. number of people that are not employed.

Homework Equations

No equation is involved.

The Attempt at a Solution

I know there is something like census; which is an official count or survey of a population, typically recording various details of an individuals.
Population is further subdivided into occupational distribution of population, gender distribution of population and age distribution of population.
What am concerned with right now is the occupational distribution of population. To answer that question, we need to know why government do take census on the working populace. What is the motive behind that?
To me, I think do it just to know the number of people working and those not working so as to create more employment and make life better for it citizens.
None of the multiple choice answers seem to correctly describe the motive of government in doing so. I know that choice B, C, D and E may contain one of the reason or motives that is best suitable, but I want others to help me look into the topic so that we can analyse and resolve the question together.

 

[chikis]

I think D is the most correct answer to my question.