Olmec ruins provide evidence of all of the following EXCEPT:

A. a thriving agricultural tradition, including aqueducts and crops.
B. a strong religious culture.
C. a migratory society.
D. advanced tools used for art and buildings.

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.

companies passed on production and transportation costs to consumers