The shift toward mass production affected consumers by
a. making goods less expensive
b. creating a greater variety of goods
c. creating fewer luxury goods
d. making good that lasted longer

The correct option is "a. making goods less expensive"

Chain production, mass production, series production or mass production was a revolutionary process in industrial production whose base is the assembly line or assembly line or production line; a form of organization of the production that delegates to each worker a specific and specialized function in machines also more developed.

i believe 5 is correct answer

genetics is the study of how dna works, the methodologies defining the new recent technologies allow scientist to have a panoramic view of the entire dna landscape, especially how genomes interact with their environment, including off course, factors outside their organisms.

thus is very possible the existence of both scenarios, where populations of isolated individuals have different genetic traits, and share traits related to genetic mutation, due rats can easily travel overseas using human transport channels. so scientists could get a vast number of data, including human interaction, evolution of rodents, health development, spread of infections, development of new organisms, how genomes evolve in different environments and so on.