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
Retentive clasp arms should be placed on each abutment tooth such that 
Select and explain. 
A. The retentive terminals are below the height of contact, B. There is a frictional fit on the surface of the abutment, C. They are in approximately the same degree of undercut, D. The retentive terminals are above the height of contour
C: They are in approximately the same degree of undercut
Answer: C: They are in approximately the same degree of undercut 
Explanation: None