appearance/ steamboats and railroads/ reduce/ transportation cost/ and have effects/ conditions/ workers. A. Appearance of the steamboats and the railroads have reduced transportation cost a
appearance/ steamboats and railroads/ reduce/ transportation cost/ and have effects/ conditions/ workers.
A. Appearance of the steamboats and the railroads have reduced transportation cost and had effects in conditions of workers.
B. The appearance of the steamboats and railroads have reduced transportation cost and had effects on conditions of workers.
C. The appearance of steamboats and railroads had reduced transportation cost and had effects on conditions of workers.
D. The appearance of steamboats and railroads reduced transportation cost and had effects on the conditions of workers.