The correct answer is B: The Credit Mobilizer
Credit Mobilizer was a French banking company which was a significant financial institution of the world in mind 19th Century. It financed several railroads in the railway expansion.
In the first year, it funded the "southern line", the "grand central," the French "eastern" line, and many others in their first years. Through its contribution, the railroad network expanded from 2,000 miles (3,600 km.) in 1852 to 11,000 miles (18,000 km.) in 1870.