The correct answer is D. The conflict that gave the British Empire effective control over North America in the 18th century was the French and Indian War.
It is known as the French and Indian War (1754-1763) to the part of the Seven Years War developed in North America. The name refers to the two main enemies that the British faced: French and different tribes of Native Americans.
The war was the result of tensions between British and French due mainly to the expansionist pretensions of the colonies of both countries.
In North America the first British attack took place in May of 1754 although the first confrontation that was beyond a skirmish took place two months later, in July, in Fort Necessity. The contest was developed during nine years, in principle with clear French predominance, although the final result was favorable to Great Britain, with the conquest of Canada. The peace was reached with the Treaty of Paris and meant the loss of all French continental possessions since it had to cede Louisiana to Spain in compensation for the loss of Florida in the hands of the British.