Given a text T, and several options, according to the question posed in the text T to choose the most appropriate option from the options as the answer, please directly output the most appropriate option, do not need to output the explanation.

During an economic recovery, a lagging unemployment rate is most likely attributable to:
Option A:businesses quickly rehiring workers.
Option B:new job seekers entering the labor force.
Option C:underemployed workers transitioning to higher-paying jobs.

Answer: B