Compared with Elaine Chao's assessment, the economists' estimation of 200,000 new jobs created in January is ______.

A．the way in which the labor market runs
B．the number of jobs offered in the labor market
C．the sector in which the economy creates jobs
D．the job demand in the labor market

A．the consecutive job loss in manufacturing sector
B．the workers' inadequate skills for the new jobs
C．the high work efficiency of every single worker
D．the machines' replacement by the workers