Which of the following expresses a cause of the increase of specialization of labor

The colonies began fighting against Great Britain, but NOT as part of the revolutionary war, the protests began many years earlier. For example, Boston Tea Party was fighting against the Tea Act and occurred in 1773.

Washington didn't command the army until the next month of that year, he was appointed commander at the meeting

The colonists declared independence in 1776

George Washington didn't force the British to leave Boston until Dorchester Heights in 1776.