The Constitution established a framework for limited government, which included a federal system, separation of powers among the branches of government, and

Checks and balances

Explanation:

Limited government is a term that is used to describe a political situation in which the government of a country is limited in terms of power utilization. This is the direct opposite to unlimited government such as absolute dictator or monarchy in which the while power rest on the government.

Also, checks and balances is a term that describes the principle in which power is shared among different branches of government such that no branch of government has absolute power.

Hence, The Constitution established a framework for limited government, which included a federal system, separation of powers among the branches of government, and "CHECKS and BALANCES"

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.