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
True about Rest is: 
Select and explain. 
A. Provides vertical support, B. Should always be located on properly prepared tooth surface, C. Rest are designated by the surface of the tooth prepared to receive them, D. All of the above
D: All of the above
Answer: D: All of the above 
Explanation: Any component of a partial denture on a tooth surface, that provides vertical support is called rest.
Rests should always be located on properly prepared tooth surfaces. 
The prepared surface of an abutment to receive the rest is called the rest seat.
Rests are designated by the surface of the tooth, prepared to receive them (occlusal rest, lingual rest, and incisal rest).