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
Pitting of direct filling gold usually results from 
Select and explain. 
A. Using contaminated gold foil, B. Poor finished preparation, C. Improper stepping of condenser point, D. using small condenser point
C: Improper stepping of condenser point
Answer: C: Improper stepping of condenser point 
Explanation: None