When systems thinking is applied to public health which one of the following will be true?

$$ a$.$ Brilliant models will be run that forecast all potential problems so that policies can be optimized and there will be little need for later amendments.

$$ b$.$ Communication strategies will help sell the community on the policy so they don$$t meddle with it and mess it up

$$ c$.$ The policy maker will expect that unintended things will happen and will build in regular listening and adaptation of the policy

$$ d$.$ Only qualified and competent policy makers who understand systems will be allowed to be involved in policy making