Hey Blabl,
Something that happened 100 years ago is also known as a century!
I hope this helps.
The one that caused serious conflict among various groups of the people in the west is : D. Mining
Back then, finding a land filled with valuable gold and metals is the fastest way to a rich and extravagant lives since back then the one who own the mine is the one who find it. But often time, the greed forced people to hurt each other for the sake of mining location's ownership
hope this helps
they all include studying, either history or people, or nature. they all include observing something and studying it.
