This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Biostatistics, Subject name: Social & Preventive Medicine
Best method to show trend of events with passage of time is- 
Select and explain. 
A. Line diagram, B. Bar diagram, C. Histogram, D. Pie cha
A: Line diagram
Answer: A: Line diagram 
Explanation: .