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Sophie [7]
3 years ago
15

HURRY PLEASE!!

History
2 answers:
slava [35]3 years ago
7 0

I believe its RADAR.

They had airplanes in world war 1.

Same with machine guns.

And the first repeating rifle was made in 1860.

Which leaves the Radar.

-Steel jelly

NISA [10]3 years ago
3 0

A) Radar

because its not airplanes

machine guns

repeating rifle.


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