Which Of The Following Weapons Contributed Most To The Stalemate On The Western Front Trench Warfare During World War I?

Which Of The Following Weapons Contributed Most To The Stalemate On The Western Front Trench Warfare During World War I? Machine guns inflicted appalling casualties on both war fronts in World War One. Machine guns could shoot hundreds of rounds of ammunition a minute and the standard military tactic of World War One was the