
Passage: Since 1987, the birth rate of China's population has gradually declined. The labor shortage marked by the "shortage of migrant workers" first appeared in 2004, and the absolute number of labor will decline gradually after reaching its peak around 2013. In the future, in order to ensure the employment of workers, enterprises must increase the level of wages and welfare benefits of workers, thereby increasing the proportion of the of labor in the total cost of production.
Question: Which of the following options, if true, constitutes the strongest challenge to the above conclusion?
A. A.The process of "aging" in Chinese society is accelerating, and relevant departments have proposed to postpone retirement to solve the shortage of pensions.
B. B.Some domestic labor-intensive enterprises begin to increase the number of robots on the production line.
C. C.The relevant departments are studying whether appropriate adjustments should be made to the family planning policy.
D. D.Enterprises will try their best to reduce the cost of production in order to maintain profits.
Answer: