Answer:
The American revolutionary war had the positive impact on the slaves as due to this war the slavery system was eliminated in the North American region. Thus the correct answer is Option A.
Step-by-step explanation:
The American Revolution which is also known as American freedom war took place in April 1775 and this was deeply affected the economic conditions of the American citizens.
In this war, the America came forward with its thirteen colonies against ruling Great Britain to get freedom from the harsh and cruel rule of English government. The starting war face off between U.S and Great Britain took place on the North continent of America.