<span>technological advances that lowered transportation costs dramatically</span>
Answer:
the german exspansion was because the german people where angry at the treaty of versilles and the apeasment made Hitler think that no one would say no
explanation:
Group A I believe
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
<span>World's first scheduled commercial airline</span>
Both dynasties revived the trade system along the silk road
D. Hope this helps. Mark brainiest please.
