Read the attachment and Why were the colonists upset about the Proclamation of 1763?

Explanation:

The Royal Proclamation of 1763 was very unpopular with the colonists. This angered the colonists. They felt the Proclamation was a plot to keep them under the strict control of England and that the British only wanted them east of the mountains so they could keep an eye on them.

a historian researching the immigration policies of the early 1900s would expect a source written today,rather than in 1910 to :

( a ) be more interested in objective data and statistics.