after germany’s unification in 1871, industrialization accelerated and1 surpassed the us becoming first in steel production.2 industrialization continued mainly in the west.3 workers for industrial jobs were difficult to find.4 constructed vast networks of railroads.

The correct answer is alternative 4 (D): "Constructed vast networks of railroads."

After its unification, German Industry grew strong, but it didn't surpass the US in steel production, and industrialization continued all over the land. Besides, it wasn't hard to find workers for industrial jobs.

The construction of railroads is both a result of and a factor in the industrial growth of Germany.

the ones that are losing there jobs