Australia has a federal system of government. this means that power is
a) centered in the country's state governments.
b) centered in the country's national government.
c) divided between australia and the united kingdom.
d) divided between the national and state governments.

Australia has a federal system of government. This means that power is centered in the country's national government.

Explanation:

Australian government has a federal democracy which reflects both the American and British parliament while it’s governing method. Chief of the country is the prime minister. It also has two-tier legislature which has a council and House of Representatives. There are multi party systems that exist in Australia.  

The executive authority is in the command of the governor general and he is the head of the army and military and navy operations in Australia. The apex court in Australia is the high court consisting of chief justice who heads a panel of six other judges.