Frictional unemployment is the result of
a. a slowdown in the economy.
b. the ups and downs in inflation.
c. a persistent mismatch between the skills and characteristics of workers and the requirements of the jobs.
d. the search process of matching workers with jobs.

d. the search process of matching workers with jobs.

Explanation:

Frictional unemployment is also called "Search Unemployement" is base on the individual's circumstances and is independent of the economy. Commonly is the time "between jobs" when the person is searching for a new job or transitioning from one job to another. This is a temporary unemployement and it can be though like a good sign for the economy since it idemonstrates that people are looking a better job that the one they had before.

answer; complain or request hazard correction from your employer;