BIG QUESTION LAST QUESTION PLEASE SOMEONE HELP
Which group best describes the order of events in the development of the airplane?
Group A
Hot-air balloon flights pioneer air travel
Aviators fly gliders—heavier-than-air aircraft with no engines
Development of engine-powered machines with propellers and lightweight motors
First-ever flight across the English Channel
Construction of the first military airplanes
World's first scheduled commercial airline
Group B
Development of engine-powered machines with propellers and lightweight motors
World's first scheduled commercial airline
First-ever flight across the English Channel
Hot-air balloon flights pioneer air travel
Aviators fly gliders—heavier-than-air aircraft with no engines
Construction of the first military airplanes
A.
Group A
B.
Group B