This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Dental
A diagnostic wax-up is indicated when _____. 
Select and explain. 
A. Re-establishing anterior guidance, B. A provisional fixed prosthesis is to be fabricated, C. Uncertainty exists regarding esthetics, D. All of the above
D: All of the above
Answer: D: All of the above 
Explanation: It is recommended that any time there is a question regarding the treatment outcome involving a prosthetic device, or the need to produce templates for provisional restorations that reproduce a desired form of teeth, a diagnostic wax-up should be generated.