Question

What was NOT a new technology used in World War I that contributed to the massive casualty rates?

A) U-Boats
B) poison gas
C) Machine guns
D) Jet fighters

Answer 1

D

Step-by-step explanation:

Because it was not invented before or during the WW1

Hope I am right

Answer 2

D. Because that was something made AFTER WWl it was made before wwll but after wwl