a) Whitman massacre is the correct answer .
The correct option is A
Sherman seizing of Atlanta
Battle of Atlanta, one of the fiercest battles, was fought with the intention of denying the confederates, an important supply line via the railway. Their defeat by Sherman was very important and a major turning point for the union course as it led to the defeat of the confederate soldiers.
The industrialization was different...Europe was further advanced in industry than America was.