Which statement best describes how machine guns were used during world war i?

Machine guns were used usually by multiple troops. It could shoot multiple bullets out at one time for as long as you held the trigger. Back during World War 1 the machine guns would often overheat within 2 minutes of firing which is why there needs to be cool water handy at all times to cool the gun. Also a ammunition belt fed the gun bullets

d: to defend territory

Explanation:

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Andrei karlov was the russian ambassador

Blue ridge is the correct answer.