A. In the early 1900s
According to australia.gov.au :
"Australia became an independent nation on 1 January 1901 when the British Parliament passed legislation allowing the six Australian colonies to govern in their own right as part of the Commonwealth of Australia".
bottom one which you've ticked is correct
He claimed they invaded US
I think the answer is City dwelers
The Chinese created all of those things because they started to advance and had to use new technology.