The correct statement among the options provided is:
d.) The U.S. gained control over most of Canada from Britain as a result of the Treaty of Ghent.
During the War of 1812, which took place between the United States and Britain, the Treaty of Ghent was signed in December 1814. This treaty marked the end of the war and restored the status quo ante bellum, meaning it returned all territories to the way they were before the conflict. Therefore, the statement that the U.S. gained control over most of Canada from Britain as a result of the Treaty of Ghent is not true.
The accurate statement should focus on the Treaty of Ghent not leading to the U.S. gaining control over Canadian territories.