Which of the following statements most accurately characterizes the British colonial frontier before 1750?

Which of the following statements most accurately characterizes the British colonial frontier before 1750? Hundreds of British colonists moved into the area west of the Appalachians. The Iroquois covenant chain broke down, and the confederacy's power diminished. A lack of natural transportation routes kept the British east of the Appalachians. The French abandoned their fur-trading forts in the Ohio region.