Sectionalism was caused by multiple issues at that time. It occurred
because of slavery, slave power conspiracy, economic differences and cultural
differences. The main cause of sectionalism was slavery because how Northerners
don’t like how Southerners don’t see the immorality of it.
They are all allied victories defeating the axis powers
The answer is D. <span> invention of the first steel tools
Actually, this very topic is still a hot debate among scientists because the shift happens on different reasons in each region of the world.
But one thing they have in common is that Steel tools give the member of early societies the capabilities to rake uplands and cutting up crops that really useful in farming and herding.</span>