There were many reasons for this, some because of the respective economies pre-war, some because of where the war was fought, and some because the North won and the South lost.
Answer:
1) human existence
Explanation:
The concept of socialization, including parenting, or child-rearing,
social development, and education goes back in time as far as human existence.
This is because humans were always known to procreate which is why we aren’t extinct. This procreations produced families which related with each other who were present in the same region. The children were taught to hunt and do other activities which helped in their developments.
Informal education was also present during that time which after several years became more formal.
The correct answer should be monetary standard.
Grover Cleveland who won wanted the gold standard while his opponents supported bimetalism.