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
Guiding planes on abutment teeth provide: 
Select and explain. 
A. Predictable clasp retention, B. Increased resistance towards horizontal movement, C. Transmit forces along long axis of tooth, D. Guides the key into the key way
A: Predictable clasp retention
Answer: A: Predictable clasp retention 
Explanation: None