In order to help expand railroads throughout the country after the Civil WarCongress A brought in thousands of laborers from China B) provided companies tand of charge spent toz researching steam engine technology the Confederate States heavily to fund construction

Option:  B) provided companies land free of charge.

Explanation:

After the Civil War, the United States was dominantly rural with people living on farms and small towns. Congress helped companies to expand railroads by giving them land grants. Railroads are vital for the settlers to transport their agricultural product like wheat and stocks in markets. The construction of railways began in the West.

russia because it is the biggest state