Why did LBJ sign the Civil Rights Act of 1964? Was it Politics or Principle? 3 paragraphs please I have a f in her class

The rise of advertising in the 1920s. i am good with seeing how advertisements shape the roaring twenties and how it developed a new way of life through modern days. but i am not sure what the details of advertising in the 1920s were. if possible can you send me links (preferrably credential links) to sources that maybe show like the first company to start advertising through the radio, how advertising benefits (statistics graphs), etc.

How did the industrial revolution give an advantage to industrialized european nations over non-industriallized nations?

Based on the information given and the gauges which process or processes have their alarm light on?