What statement stopped the colonization of the Americas by Europeans?

AMonroe Doctrine
BConventions of 1818
CAdams-Onis Treaty
DRush-Bagot Treaty

Verified Answer :

A.monroe doctrine because during james monroe presidency he was afraid if the colonization from european imgrat to the north american or south american then they would have more power then him.
More land more power. My teacher used to tell me
Iike that. Hope this help!