Answer:
<h2>Letter B</h2>
Explanation:
Trappers were attracted because of the plentiful fur-bearing animals; settlers were attracted by the fertile land in certain areas such as the Willamette River valley. ... They found passes through the Rocky Mountains and later showed settlers the trails west.
The answer is C: Relative dating can only tell whether one rock layer came before or after another, while absolute dating can give the age in years.
Well they invented the abacus and the wheel
