Final answer:
Factors affecting the national rate of unemployment include economic policies, technological advancements, and demographic changes.
Step-by-step explanation:
The factors affecting the national rate of unemployment (NRU) include economic policies and government regulations, technological advancements, and demographic changes. Economic policies and government regulations can influence unemployment by shaping labor market conditions and affecting the level of job creation and destruction. Technological advancements can lead to changes in the demand for labor and skills, potentially affecting employment opportunities. Demographic changes, such as population growth or decline, can impact the labor force participation rate and the overall level of unemployment.