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
In comparison to maxillary first molar 2nd molar has 
Select and explain. 
A. More distorted crown, B. Obtuse angle becomes more obtuse, C. Acute angle becomes more acute, D. All of the above
D: All of the above
Answer: D: All of the above 
Explanation: None