For System Designers, a Principle They Should Follow in Dealing

For system designers, a principle they should follow in dealing with concerns about errors is:

A) A system should have a mechanism to punish error makers;
B) A system should be able to help a user correct or undo an error;
C) A system should give a lesson to a user after an error is made;
D) A system should automatically report all errors made by system users to the system administrator;
E) A system should exaggerate impacts from errors to users so that they won't make them again.