Which one of these factors plays a role in determining the extent and duration of frictional unemployment?

The correct answer for the question that is being presented above is this one: "B. the extent to which government legislation requires firms to provide health insurance for employees."

Here are the following choices:

A. the education and skill levels of labor force participants

B. the extent to which government legislation requires firms to provide health insurance for employees

C. the degree to which the overall level of business activity fluctuates up and down

D. the ease with which job seekers can obtain information about job openings