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
Indirect retainers of a partial denture: 
Select and explain. 
A. Engages undercut areas, B. Most effective when close to direct retainers, C. Must be constructed with flexible materials like plastics, D. Should resist rotatory forces about a fulcrum
D: Should resist rotatory forces about a fulcrum
Answer: D: Should resist rotatory forces about a fulcrum 
Explanation: None