They were searching for gold. Also at the time, people could get money for killing Native Americans.
No they were not they failed.
I believe the answer you are looking for is A.
SO Egypt.... Egypt started thousands and thousands of years before anyone, somewhere around 5000-3000 BC. One of the first major civilization but it came to a end when Rome took over Europe and half of the known world and after Rome fell in 476 AD Egypt was never mentioned in any history books... So the "New Kingdom" fell due to Romans and since they had no armies to defend themselves.
Hope this helps :)
