Which event led the United States to declare war on Germany during World War I?

A.
the Sussex Pledge violation
B.
the Zimmerman note
C.
failure of the Nivelle Offensive
D.
the spread of British propaganda

Which of the following statements is true about the treaty of versailles ?

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.

Why did admiral leahy think the use of the atomic bomb on hiroshima and nagasaki was ethically wrong