How did mass culture signify a change in american life?

It made culture and race more diverse.  Unlike the first migration where majority were from England or other European country, you now have more ethnic races settling in the New World.  They have brought with them their cultures and traditions which assimilate with the current culture there.

i do believe its (d) it allowed the government to offer pioneers sixty acres of western land if they lived on it and made improvements to it.

explanation: signed into law in may 1862, the homestead act opened up settlement in the western united states, allowing any american, including freed slaves, to put in a claim for up to 160 free acres of federal land. by the end of the civil war, 15,000 homestead claims had been established, and more followed in the postwar years

i also think it is c