What action did congress take to support southern african americans?

How should the student cite this source using mla citation format?

During the era of european expansion, what was the biggest reason for spain’s push for exploration?

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)