Tom Worked at NASA for 13 Years

Tom worked at NASA for 13 years.In the 14^th year,his job was automated,resulting in him losing his job.He looked for a new job for 18 months before finding a job in a different line of work that paid less.During his 18-month job search,Tom was considered to be

A) Cyclically unemployed.
B) Structurally unemployed.
C) Frictionally unemployed.
D) Seasonally unemployeD.Tom lost his job because his skills were no longer needed; as such,he was considered structurally unemployed.