The roaring twenties were called this because this was after the US won WWII so everyone was celebrating. The US started prohibition, but people kept on drinking and partying. It got so bad and crazy that this was one for the main reasons for the Great Depression
The most useful is documentary evidence. Things people have written. Old newspapers, personal accounts, even things like letters, bank records, govt. records, etc. For fairly recent history there are photographs and even films and videos.
But even writing only goes back about 6000 years. Before that there is archaeological evidence. From studying the debris of ancient civilizations historians can determine what their buildings looked like, what they ate, who they traded with, what they thought was
The ruling established federal supremacy over the states with regard to certain matters in their states.
Answer:Li-Yuan joined with other rebels to lead a revolt which overthrew the Sui Dynasty and established himself as Gaozu, first emperor of the Tang Dynasty. Taizong was a brilliant strategist & charismatic leader whose contributions to the overthrow of the Sui were rewarded when his father named him Duke of the state of Qin.
Explanation:
The answer to this question is most likely B or C
