What event started the French and Indian war?

a) Britain's decision to enter into war with France

b) the Governor of Virginia staking claim to the Ohio Valley

c) George Washington's troops attacking a French scouting expedition

d) Indian attack on the state of Virginia

The colonists called it the French and Indian War, and it permanently shifted the global balance of power. By the mid-18th century, both the British and French wanted to extend their North American colonies into the land west of the Appalachian Mountains, known then as the Ohio Territory.

I'm pretty sure it was just A but I could be wrong.