The correct answer is "the colonists grew increasingly frustrated with British control and taxes."
After the end of the Seven Years' War, the colonists grew increasingly frustrated with British control and taxes.
The Seven Year's War shifted the balance of power in favor of the English.
What started as another armed conflict between France and England over the control of territories in North America, ended up being an international conflict that involved other European nations such as Prussia, Portugal, and Spain. The French and Indian War started in 1754 and transformed into the Seven Years War that ended in 1763 with the victory of England.
After the war, Great Britain was in deep debt and needed money desperately. So the British monarchy decided to impose heavier taxation on the American colonies, and of course, this infuriated the colonists.