One Reason That the British Government Decided to Compromise on the Oregon

One reason that the British government decided to compromise on the Oregon Country border was

A) that the Hudson's Bay Company decided it would sooner deal with the Americans.
B) that British anti-expansionists opposed acquiring the Columbia country.
C) John Tyler's election to the presidency.
D) that they realized the harbor of Vancouver was as good as that of Seattle.
E) they wanted American support against Spanish and Russian claims on the west coast.