Answer: I believe the correct answer is A. or the first option Airplanes.
Step-by-step explanation:
The first airplane was launched from a moving ship in May of 1912. The planes weren't as technologically advanced and needed to land on the water then be retrieved. So, the technological advancements weren't very well back then at all and Airplanes were one of the first new improved weapons during WW I to be used.