What was the major result of henry ford's innovative manufacturing techniques

a. the sale prices of cars went down
b. the sale prices of the average car increased
c. more americans bought cars from overseas
d. fewer americans had jobs

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.

ba geologist finds four sedimentary rock she determines that no geologic events have shifted the layers she labeles them a,b,c,dbfrom top to bottom