What was the primary purpose of the Bourland and Miller Commission established in Texas in 1850?

The primary purpose of the Bourland and Miller Commission, established in Texas in 1850, was indeed to investigate land title issues. This commission was formed in response to the complexities and disputes surrounding land titles that arose from the transition of Texas from a republic to a state in the United States. During that time, numerous land grants and titles were in question, particularly those that had been issued under different governments, including Mexico and the Republic of Texas.

The commission's work focused on clarifying ownership and providing solutions to the numerous claims that had emerged due to the lack of a formalized system for addressing land titles. By investigating these issues, the Bourland and Miller Commission aimed to establish a more orderly and legally recognized framework for land ownership in Texas, which was essential for the growth and development of the state.

The other options, while related to land management and development, do not accurately reflect the specific mandate of the Bourland and Miller Commission. The commission was not tasked with surveying railroad routes, establishing new land grants, or managing public school land; instead, its primary focus was directly on resolving the conflicts and uncertainties of land titles. This important role was foundational to the legal and economic stability that facilitated Texas's growth in the following years.