Frictional Unemployment Occurs When Job Openings

Multiple Choice

Frictional unemployment occurs when job openings:

A) exist and people are willing to take them, but the applicants do not have the necessary skill set.
B) do not exist, although people are willing to work, so it makes no sense to try to bring the two together.
C) exist, but people are not willing to take them, so it makes no sense to bring the two together.
D) exist, and people are willing to take them, but it takes some time to bring the two together.