Which of the Following Explanations About the Historical Development of Advertising

Multiple Choice

Which of the following explanations about the historical development of advertising in the 20th century is true?

A) Ads were often a gateway to integrate society and erase differences among people.
B) Ads were banned from radio for most of the early 20th century.
C) Ads using racial stereotypes were banned.
D) Ads were a chief tool for the masses to challenge the ruling class.