<span> 30% growth in GNP between 1922-1928
Automobile and automobile-related industries were booming and employed almost 4 million workers.
Unemployment was low between 1923-1929. Only about 3%.\
High purchasing power. People were spending money with their higher wages.</span>
Why did historians choose to study this topic the correct answer is b
Answer:
Invasions by Barbarian tribes
Western Rome's collapse pins the fall on a string of military losses sustained against outside forces. Rome had tangled with Germanic tribes for centuries, but by the 300s.
Lots of water, shelter, animals, and vegetation. However, forest fires are very lethal, sicknesses can develop and farming must be very hard.