[单项选择]Labor force is defined as being the total number of people who are available to work and earn in- come. This definition includes everyone who is employed or seeking paid employment, so it includes employees and the self-employed: Labor is one of the Country’s resources which can be combined with other resources to produce the goods and services required by the community.
Though the size of the workforce relies greatly on the size of the total population, there are several other aspects which also affect it. The age distribution of the total population has a very marked effect on the available workforce. If the population has a high proportion of very young people or of those too old to work, then the available workforce would be lower than if there were an evenly spread age distribution. If the population grows rapidly from natural increase, i.e. the number of births greatly exceeds the number of deaths, then as a total population increases the proportion in the workforce declin
A. a population growth from natural increase leads to a greater proportion of the workforce
B. a large population does not necessarily mean a higher proportion of workforce
C. the larger the number of the aged in a population, the higher the proportion of the workforce
D. if the population has an evenly spreaded age distribution, the workforce will be lower