Which of the Following Is NOT a Way to Ensure

Which of the following is NOT a way to ensure data is entered properly?

A) Be sure to set constraints or rules on as many fields as possible.This will ensure that users are entering data the way you want it to be entered.
B) Restrict what data can be entered into a field that users have to enter exactly what you want them to or they will not be allowed to enter any data.
C) Verify that all restrictions will adequately accept every variant of accurate data.You do not want valid data excluded.
D) Remember that garbage in leads to garbage out.