The statemetn that most accurately describes the reasons for Seven Years´War in North America is option B. Both the French and the British wanted control of the Ohio River Valley.
The Seven Years War which lasted from 1756 to 63 was the first global war, fought in Europe, India, and America, and at sea. In North America, imperial rivals Britain and France struggled for supremacy. At the beginning of the war, the French (aided by Canadian militia and Aboriginal allies) defeated several British attacks and captured a number of British forts.
