What Was the Major Cause of the French and Indian

What was the major cause of the French and Indian War?

A) The Native American tribes of Canada had been attacking various French forts, trying to stop them from expanding into the area.
B) The French and British both wanted to control the fur trade in the Ohio Valley area.
C) The British wanted to control Canada, and had attacked several French cities.
D) The Spanish hoped to gain territory north of Florida, and had been harassing the British colony of Georgia.