The Electoral College was created for two reasons. The first purpose was to create a buffer between the population and the selection of a President. The second as part of the structure of the government that gave extra power to the smaller states.
“The Oregon Treaty[1] is a treaty between Great Britain and the United States that was signed on June 15, 1846, in Washington, D.C.. The treaty brought an end to the Oregon boundary dispute by settling competing American and British claims to the Oregon Country; the area had been jointly occupied by both Britain and the U.S. since the Treaty of 1818.[2]” hope this helps
I believe the answer is A.
Kush was weakened by the loss of trade.