B: The British won the fight over the fertile Ohio River Valley and gained control of most French lands in North America.
Explanation:
The Treaty of Paris of 1763 ended the French and Indian War/Seven Years' War between Great Britain and France, as well as their respective allies. In the terms of the treaty, France gave up all its territories in mainland North America, effectively ending any foreign military threat to the British colonies there. I also took it on E2020. I hope I've helped. If you need further explanation, please comment below.