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
Angulation of the counter bevel placed in cast restoration is determined by: 
Select and explain. 
A. Amount of indicated involvement for facial/lingual surface, B. Measured by the embracing angle, C. Amount of needed retention, D. All of the above
D: All of the above
Answer: D: All of the above 
Explanation: Angulation of the Counter Bevel
Measured by the embracing angle: Angle between the bevel and the long axis of the crown - 30 to 70 degrees.
Factors Determining the Angulation
1. Amount of indicated involvement for the facial / lingual surface:

The more the desirable involvement is, the less will be the embracing angle to preserve tooth structure.

2. Amount of needed retention:

The shorter the preparation walls, the less will be the embracing angle with the long axis.
May be parallel to the intracoronal wall proper.

3. Type of cast alloy:

The less the castability, the greater will be the embracing angle.
Allows more bulk marginally.