What was a primary purpose of government land grants to railroads?

The primary purpose of government land grants to railroads was to facilitate railroad expansion for national interests. During the 19th century, the United States recognized the strategic importance of railroads for economic growth and national integration. By providing land grants, the government incentivized the construction of railroads, which connected remote areas to urban centers, facilitated trade, and promoted settlement in the West. This expansion was seen as crucial for the development of the nation's infrastructure, helping to unify the country and stimulate economic activity. The railroads played a key role in the movement of goods and people, ultimately contributing to the nation's industrialization and growth.

In this context, the other options do not align as closely with the main objective of these land grants. Promoting agricultural deforestation, enhancing local tourism, and establishing new states were either indirect results of railroad expansion or not the primary motivations behind the government's land grant policies. The focus was on using railroads to serve national interests, making option B the most accurate choice.