On constitution talk about this.
All 4 contributed, but B and D are the most direct causes.
The answer is November 8th, 1880
<span>here
is archaeological evidence for human occupation before the land bridge
from Siberia opened up.
There has also been some recent DNA evidence
that suggests there might have been some European settlers before the
Vikings.
Although most of the DNA evidence points to Northern Asia. </span>
Hold on give me a minute then I can help