Which statement best summarizes the impact of machine guns and artillery? a) machine guns played a more important role in world war i than artillery did. b) improvements in artillery made machine guns obsolete. c) both machine guns and artillery contributed to a defensive war.

It would be letter c) Both machine guns and artillery contributed to a defensive war. During the great war or other conflicts that used these weapons it enhances the defensive capabilities of the force that wields it. It also become a significant weapon during the First World War and force the two alliances bogged down in the trench warfare.

The social difference that caused sectionalism in the antebellum era would be c.)  north was disorganized. the north had slow population growth, where as the south had mass immigration.hope this really mark