Answer:
B. Fur trading
Step-by-step explanation:
The French wanted control of the Ohio River Valley because it was an important area for fur trading. The region was home to many fur-bearing animals, and the French established trading posts in the area in order to trade with the Native American tribes who lived there. The French also wanted to prevent the British from gaining control of the region, as they saw the Ohio River Valley as an important part of their colonial empire.