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