In the latte 1800’s the growth of the railroad system led to midwestern cities such as minneapolis and cleveland becoming ?

In the late 1800s, the growth of the railroad system led Midwestern cities such as Minneapolis and Cleveland to become industrial centers.

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.