Why are rising sea levels occur in Australia and New Zealand?

A.High tides and storm surge made damage property and coastal areas
B.Australia New Zealand may disappear completely sea level continue to rise
C.Rising, sea level levels are changing the climate in in Australia, New Zealand
D.Storm surges are washing away, land needed for substance farming

C. Rising sea levels are primarily occurring in Australia and New Zealand due to climate change, specifically the melting of polar ice caps and glaciers leading to increased water levels in the oceans. This is causing coastal areas to be at risk of flooding and erosion.