Which best explains why the United States sent military aid to Vietnam in the 1950s? to support the Viet Cong of North Vietnam
to help South Vietnam without committing troops
to negotiate a settlement to unify Vietnam
to convince South Vietnam to abandon communism

How was george washington able to defeat the british in the battle of trenton and princeton

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.

Atype of infrastructure that state governments maintain is schools roads libraries parks