How did tin pan alley best signify a cultural shift in the united states?

a. it led to the rise of baseball as the national american pastime.
o
b. it opened movie theaters and established a new entertainment
industry.
o
c. it resulted in the development of a uniquely american style of
music.
o
d. it encouraged workers to expect leisure time and weekend breaks.

c, they united with once

when a country suffers, for example, a drought period, the market product is affected for a low offer, in this case, potatoes; the government has to tax to the households, which have to give more money for the potatoes which they consume, that situation make them consume substitute goods even through loans, it could increase the financial market movement and the inflationary phenomena, the business has to increase salaries in order to the employees could buy a more expensive food (potatoes) and in order to inflation tha business had to buy expensive supplies in the factor market, while the rest of the world have to gain more money to consume the same amount of potatoes.

c. troops marched forward in close formation against newer, more accurate weapons

is this question from a book? ?