Australia became a nation on 1 January 1901, when the British Parliament passed legislation enabling the six Australian colonies.

Read the passage below:

Australia became a nation on 1 January 1901, when the British Parliament passed legislation enabling the six Australian colonies to collectively govern in their own right as the Commonwealth of Australia. It was a remarkable political accomplishment that had taken many years and several referenda to achieve. 

Source: Official website of the National Museum of Australia 

From this, we can infer that Australia is an example of a __________. 

A. united democracy 

B. unitary government 

C. 'coming together' federation 

D. 'holding together' federation