In western europe and north america, scientists began to understand the causes of infectious diseases at about what point in history?1850
They constitution protect slavery in a way that you can pay people to work for you but you cannot make them do it they have to be their on their own consent and it proctect slavery because people were dying from being overworked and underpaid.
Answer:
economic policies because of president Jackson
Explanation:
A should be the correct anwser, so sorry if i’m wrong