Final answer:
Option C, stating that the Board of Land Commissioners' decisions were always accepted without controversy, is the incorrect statement.
Step-by-step explanation:
The correct answer to the question is C. Its decisions were always accepted without controversy. The Board of Land Commissioners was set up to address issues related to land claims and disputes, particularly those that arose in the aftermath of the Mexican-American War when the United States acquired California from Mexico. It worked to adjudicate land claims (A) and aimed to resolve land ownership disputes (B).
However, its decisions were often controversial and not always accepted without dispute, contrary to what option C suggests. Indeed, the board played a crucial role in shaping California's land policies(D), determining the fate of many landholdings, especially in the context of the transition from Mexican to American control.