The labor force consists of:

a. all adults who are able to work.
b. all adults who are working, plus those not working.
c. discouraged workers, employed workers, plus those actively seeking work.
d. all adults who are working or actively seeking work.

The answer is D.

Explanation:

Labor force is the number of people or citizens who are within the workforce age that employed and those that are unemployed but are willing and able to work(i.e they are actively searching).

Labor force = employed citizens plus unemployed citizens

Option A and B are wrong because some adults(citizens) are not working and they are not willing to work.

The most important thing here is to show willingness to work and also has the ability to work

answer (b); /// a method of measuring the opinions of a large group of people by selecting a subset of the larger group, asking them a set of questions and then generalizing those responses;

consumer credit. an advantage is that it allows consumers to afford expensive goods and services now, increasing their standard of living. however, a disadvantage is that it creates a trap for debt, if people do not have self control, they may see themselves filing personal bankruptcy.