3 choices instead of 3 lines?

The diabolical political challenge is a trilemma because Australia faces three possible options. We can try to save the Murray mouth whatever it takes; we can allow agricultural practices to continue as long as the changing climate permits thus condemning the Coorong to change; or we can invest in shifting affected rural communities towards our future climate while also attempting to manage some minimal flow to the mouth of the Murray. I do not believe any of these options have been costed in the 30-50 year time-frame that is dictated by the inevitable existing commitment to climate change and the lifetimes of agriculture and water engineering infrastructure.