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
The most appropriate method of testing the statistical significance of the differences between means of two groups is 
Select and explain. 
A. Chi square test, B. Multiple regression analysis, C. Correlation coefficient analysis, D. Student test
D: Student test
Answer: D: Student test 
Explanation: None