Answer:
The invention of the wheelbarrow aided in the hauling of heavy loads.
Explanation:
Well, mostly because of the promise of wealth and power.
In the past, many of the strongest empires in Africa gained it powered due to the trade that they did with the Europeans
hope this helps
Yes i 100% agree there are many more job and education opportunities in America but you are not guaranteed to succeed. Putting dedication into finding a job and working your way up will better your odds of success. everyone has different opinions on what success is but i think it means comfortably living with less worries about money, this could never be guaranteed but you have a higher probability of achieving it while living in America.
It was the "Open Door Policy" that was the name of the trading policy that Secretary of State John Hay initiated with China and the European nations that already had a presence there, since the US wanted to benefit from trade with China as well.