Based on the chart, which of the following best describes a pattern in the spread of railroads in Europe from 1830 to 1850 ?
A
Multinational empires adopted railroads more extensively than other states did.
Countries that industrialized the latest had the most extensive mileage of railroads by 1850.
с
The largest countries had the most extensive railroad networks by 1850.
D
Areas in northwestern Europe adopted railroads more extensively than areas in other parts of Europe.