The Difference Between an Ill-Defined Problem and a Well-Defined Problem

The difference between an ill-defined problem and a well-defined problem is that a well-defined problem ___,whereas an ill-defined problem ___.

A) clearly states the operators and algorithms available to solve the problem; doesn't
B) clearly states the constraints and boundaries of the problem; doesn't
C) clarifies what tools are available to reach the goal; doesn't attempt to clarify how the problem will be solved
D) has a clear beginning and end state; doesn't have a clear end goal