People believe that conventions created specifically for the ratification of amendments form better representations of the people's will. State legislatures can oftentimes be biased for or against a certain amendment for their own wellbeing rather than that of the people they represent.
One major historical example of this can be seen in the use of ratification committees for the ratification of the American Constitution; the Founding Fathers believed that certain state legislatures would not ratify the Constitution even if the citizens of the states wanted to, so special conventions were created to more accurately portray the will of the people.
Accessibility to resources, its hunger for power, the competition between it and others, and great trade relations.
The problem was that the colonists were trying to take away a land which belonged to another people. Some native americans were able to let them go and enable them to live in peace where they chose, other native americans decided they would opt for the more harmful choice.
B Leland Stanford or perhaps c but I'm pretty sure B