How Did Oregon Fever Affect National Politics in the United

How did Oregon fever affect national politics in the United States in 1844?

A) Enthusiasm for settlement in Oregon nearly led to war with England.
B) The idea of expansion into Oregon split both the Whig and the Democratic Parties.
C) Talk of expansion led to talk of the spread of slavery,which Congress prevented with a gag rule.
D) The possibility of expansion into Texas became a major issue in the presidential election.