(mc)which of these took place in the united states during the 1920s? creation of a system of social welfare programs rapid expansion of minority participation in politics establishment of strong legal rights for labor unions development of a consumer advertising industry

The correct answer is D) development of a consumer advertising industry.

What took place in the United States in the 1920s was the development of a consumer advertising industry.

The famous "roaring 1920s" was a time of prosperity in the United States. People had cash and bouy things for their homes and other commodities. Advertising played a big role in marketing products that could be affordable for people, need it or not. This allowed consumerism to be part of American society in the "roaring 1920s."  

the answer is typhoon

the answer is a. the harappan civilisation is also called the indus valley civilisation, this is because they built their cities along the indus river. the reason behind this location can be found in the rest of the "old world" civilisations like mesopotamia or egypt, the first built their cities along the rivers tigris and euphrates, the second along the nil; : their respective civilisations thrived because the overflowing of their respective rivers produced favorable conditions for agriculture, their main support.