Which event occurred between 1763 and 1776 was the most significant cause of the american revolution

Depending on what you have been learning most recently, it could be any of the following
· The Treaty of Paris was signed (brought an end to the French and Indian War, giving Britain claim over all of the east of the Mississippi River)
· The Stamp Act was passed ( it required that all colonists purchase marked, taxed paper for use in newspapers and legal documents. This was done in order to stop the rebels from printing newspapers that encouraged rebellion)
· The Boston Massacre (In which Redcoat troops fired into a crowd of sailors, when one redcoat soldier was knocked over (some believe it was an accident others think it was on purpose; its debatable)
 
Hope its one of these!