It was given to the US as part of the 1819 Adams-Oniś Treaty
Deadly Deserts and Towering Mountains. ... China's towering mountain ranges cover two-thirds of the country, including the Himalayas, which hold the world's tallest peaks along the country's western borders. These treacherous deserts and mountains kept early China isolated from Western civilizations.
1st question yes second question idk
B i think that should do it