Structural unemployment is the result of

a. not enough jobs for everyone to be employed.

b. unemployed workers' skills not matching available jobs.

c. a decline in the demand for labor, such as during a recession.

d. temporary periods of unemployment while workers are changing jobs.

b. unemployed workers' skills not matching available jobs.

Explanation:

Structural unemployment is a result of a mismatch between worker's skills and the available job openings. Changes in economic situations such as the emergence of new technology or industry relocation may leave some workers jobless.

Structural unemployment is a long-lasting phenomenon. It requires workers to acquire new skills to get a different type of job. Structural unemployment may occur even when the economy is booming. Structural unemployment can be avoided by retaining and offering geographical subsidies.