What was one cause of the French and Indian War? A
American Indian attacks on French colonies
B
British attacks on French merchant ships
С
a French naval blockade of the port of Savannah
D
British expansion into the Ohio River Valley

Your answer is D, or British expansion into the Ohio River Valley/

Explanation:

There were French colonies in North America at one point, but this did not cause the French and Indian War. British ships did not attack any French merchant ships, and the French never formed a naval blockade on the port of Savannah, meaning that D is the correct answer.

Hope it helps!  

the answers is b.   environments.

the answer here would be