Hi! Can somebody please help me? If you know the answer, I'm offering 5 points for the answer!

Australia and New Zealand are sovereign members of the Commonwealth of Nations, which includes the United Kingdom and Canada. This voluntary political union is MOST LIKELY based on

Ashared geographic borders.
Bshared religious traditions and values.
Cthe desire to easily share natural resources.
Dthe migration of the British to Australia and New Zealand.