The labor market includes low-paid, unskilled, insecure jobs, while the labor market includes higher-paid, higher-benefit positions often in large, bureaucratic organizations or companies.

Explanation:

A labor market functions in a demand and supply mechanism. It is a place where supply and demand for employment takes place between employers and workers. In a labor market, employers try to hire the best workers while the workers try to find the most profitable job. There are different markets for every different types of labor.

The two main types of market are the primary labor market and secondary labor market. A primary labor market includes mostly of low paid, unskilled, insecure, seasonal or contractual jobs. This kind of labor market mostly looks for wage-earners and other contractual workers.

A secondary labor market includes higher-paid, higher-benefit positions often in large, bureaucratic organizations or companies. It constitutes of permanent, secure and professional jobs and mostly hires professionals and skilled workers.

i would say b. research typically uses a variety of sources

c it has to be i googled it