The westward expansion of the United States heightened tensions

The westward expansion of the United States heightened tensions over the issue of _______.
A.Yalta
B.President Roosevelt
C.Jamestown
D.The Smith Act
E.the Bill of Rights
F.Black Thursday
G.slavery
H.President Wilson
I.two-thirds
J.stamp tax
K.Federalist Papers
L.three-fourths
【正确答案】：G
【题目解析】：【考点点击】本题主要考查美国西部扩张。
【要点透析】美国的西部扩张加剧了奴隶制问题的紧张气氛。P201