He allies agreed on a "europe first" strategy because only germany had the ability to bomb britain, fight u. s. and british navies, and
a. defeat italy and japan
b. seriously threaten to defeat the soviet union
c. send waves of bombers to attack its enemies
d. convince japan to surrender

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.