Answer: setup with built-in safeguards to allow appeals for mistakes or bad decisions.
Explanation: In other to ensure validity of an answer, decision or choice, the correctability of the chosen option should be clearly defined, laid down and emphasized. Correctability requires that necessary safeguards, error checking procedures and vetting patterns are established to ensure that only option or choices which clearly meets up with the demand and requirement of the guidelines provided are considered correct or valid and choice who don't are considered invalid or incorrect.