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
Which of the following is a disadvantage of the DMF index 
Select and explain. 
A. It is time consuming, B. It is a sum of dissimilar items, C. It is difficult to determine true caries with the criteria provided in the index, D. It measures cumulative experiences and is not necessarily indicative of current caries activity
D: It measures cumulative experiences and is not necessarily indicative of current caries activity
Answer: D: It measures cumulative experiences and is not necessarily indicative of current caries activity 
Explanation: None