I believe the answer is A) The experience of being black in a white world. I am not completely sure though.
The reason that the elections between the 1828 and 1840 had
firmly established the two party system is because they are trying to unseat
the democrats in which has the power of controlling the white house since the
election of 1828 began.
B. american indians gained access to the land new englanders lived on
