The correct option is: Cause: Conflict between French and British colonists over land; Effect: Britain defeats France in the French Indian War, gaining much of France's American colonial land. (Option A).
How is that so?
Ben Franklin's refer to highlights the continuous clash between French and British colonists over land in the American communities. This conflict eventually influenced to the crash of the French and Indian War (1754-1763), which was constituent the larger Seven Years' War.
The war done accompanying a decisive British win, and the Treaty of Paris of 1763 awarded Britain much of France's pioneering controls in North America, including Canada and the lands oriental of the Mississippi River.