Why do australians have to exchange currency in order to trade with other countries i needs

Australians have to exchange currency in order to trade with other countries because:

D) Businesses in other countries use their own currency, not the Australian dollar.

the historians cited in the article all agree with one another about the cause of the civil war. despite coming from different backgrounds and cultures, the historians agree that slavery was the root cause of the civil war. the fact that all these historiansgenerally agree with one another makes their shared viewpoints more reliable and valid, especially because the historians have different backgrounds and all work for the well-respected institutions of howard university, clemson university, and the university of colorado.

colony: virginia

1: 1607,john smith

2: british were looking for gold and land

3: near oceans and theres forests

4: fishing? ithink

5: sometimes