C. Set up a restriction rule on the field: By setting up a restriction rule on the Tier field, the administrator can enforce that the field must have a value before it can be saved or updated. This will prevent users from bypassing the question and leaving the field blank.

D. Use a screen flow to ask the question: By using a screen flow, the administrator can create a series of screens that prompt the users to answer the questions and set the Tier value. The flow can be designed in such a way that users cannot proceed further without providing a response to the questions, ensuring they cannot bypass them.

Therefore, the correct answers are C. Set up a restriction rule on the field and D. Use a screen flow to ask the question.

I think C & D

Should be A & D