From 1818 to 1846, the united states and great britain administered the territory in oregon together. this was a compromise until both countries could agree on how to divide the land between them. how did the oregon treaty of 1846 settle the issue? a. the territory was split with britain getting the northern half. b. neither side obeyed the treaty, and war soon broke out. c. the u. s. had to give up fishing rights along the pacific coast. d. britain was forced to give up part of british columbia.