How is everyone I hope everyone is doing good​

What role did the catholic church play in the development of the heliocentric theory promoted by copernicus and galileo?

Why would the saudi’s oil industry need a large investment in human capital

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.