How did the government encourage the growth of big business after the civil war?

by following a laissez-faire policy of minimal regulation
congress gave generous land grants and other subsidies to railroads and other buisnesses
During the war, the Federal government provided money to people, creating
entrepreneurs with capital to spend. After the Civil War, Congress passed
legislation allowing businesses to form corporations without a charter from the
U.S. government. The government also provided aid in building a transcontinental RR for big business to ship goods and quickly travel from one place to another.