Which of the following made the machine gun such an effective weapon?

The ability to fire multiple rounds within a matter of seconds

Explanation:

guns previously manufactured to the machine gun required single action reloading styles that greatly reduced the frequency of shots that a soldier could fire. When faced against the machine gun standard rifles would leave such soldiers with no chance

for this case we have the following equation:

we apply distributive property to the terms within parentheses.

subtracting 2 on both sides of the equation:

the heightened emotion and nature images.