What did the nixon tapes reveal about what nixon knew and when he knew it?
nixon knew these things within one week of the break-in.
nixon knew of his administration's role in the watergate break-in.
nixon knew of attempts made by his administration and campaign staff to cover up their connection to the break-in.
all of the above

What two advances did europeans borrowed from china

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.

Which country was the last to join the allied powers? o great britain o france o united states o china