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
If a complete denture patient has genial tubercle at the Level of the crest of mandibular ridge, the denture base: 
Select and explain. 
A. Can cover them, B. Should not cover them, C. Should cover them but relief is not necessary, D. Should cover them and relief is must
D: Should cover them and relief is must
Answer: D: Should cover them and relief is must 
Explanation: None