I believe the answer is either C or D. But likely C
I think it is not A because the British were actually having a hard time "preventing" the mass flood of people going west.
I don't think it is B because it would not be possible to enforce them.
It would be possible to be D but the British had the problem of the Native Americans who were killing the settlers. So the British had to focus on treaties and such.
I think it is C because the British had to try to prevent the mass floods going west. They were overrunning and destroying treaties made by the British. I think it was called the "Proclamation of 1763" in which banned/restricted/limited the amount of Settlers to pass the Appalachian Mountains.
Although honestly, probably the main problem the British faced was the debt they were in after the way in which you will see the end result in the American Revolution. But that isn't a choice on here.
