Andrew jackson persuaded the states to choose their presidential electors on the basis of the popular vote. by a vote of the state legislature. by a vote of congress. by a presidential convention. on the basis of one state, one elector.

The correct option is A
On the basis of  the popular vote
 Before Andrew Jackson, electors to the USA electoral college were chosen by the state legislatures. Popular vote was not in any way connected to the presidential results.Andrew Jackson elections was a result referred to as the victory of the common man.

In the midwest because it has more moderate climate than the north or south west which makes farming far easier.