In recent decades, as sociologists point out, our nation s popular culture has become more focused on
which stage of life?
a. adulthood
b. middle age
c. youth
d. very old age

It is true that we have been more and more focused on our youth as a generation - c.

It is amazing when one thinks that the whole concepts of a youth or adolescence/teenagers didn't even exist one hundred years ago and today there is a whole cultural stream going on around teens and youths. 

1776–1860. The U.S. economy was primarily agricultural in the early 19th century. Westward expansion plus the building of canals and the introduction of steamboats opened up new areas for agriculture. Most farming was designed to produce food for the family, and service small local market.

Hope this helps!

Sincerely; Victoria

(Name Brainliest)