Can someone please help me​

Which of the following best describes the relationship between the united states and south korea today?

4. any area in which one nation has power over another; i.e. - this happened to china when it was defeated by japan

Which of the following encouraged westward expansion? a.the government decreased the price of federal land. b.each of these represents actions taken to encourage westward expansion. c.the government decreased the price of federal land d.the second national bank lowered the cost of borrowing money (reduced interest rates)