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: Social & Preventive Medicine
The trend of wents with passage of time is best shown method 
Select and explain. 
A. Line diagram, B. Scatter diagram, C. Pia chart, D. Histogram
A: Line diagram
Answer: A: Line diagram 
Explanation: Line diagram is guantitative data.
It shows trend of an event a period of time.