What was the primary reason Spain made migration to Louisiana conditional? to reduce spending related to resettlement land grants
to resolve issues related to rapid population growth
to reduce the number of Catholics migrating to the territory
to lessen the power of the non-Spanish majority

to resolve issues related to rapid population growth

Explanation:

I looked it up

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.

answer; the period of time known as the middle ages;