The correct answer is D. All of the mentioned.
A scatterplot is a graph that shows the relationship between two variables. It is a useful tool for exploring data and identifying patterns. A barplot is a graph that shows the frequency or distribution of data. It is a simple and effective way to visualize data. Overlaying is a technique that can be used to combine multiple graphs into a single image. This can be useful for comparing data sets or for visualizing the relationships between different variables.
All of these graphs can be used for simple summarization of data. They are all easy to understand and can be used to quickly get a sense of the data. However, they each have their own strengths and weaknesses. Scatterplots are best for exploring data and identifying patterns. Barplots are best for showing the frequency or distribution of data. Overlaying can be used to compare data sets or to visualize the relationships between different variables.
The best graph to use for a particular situation will depend on the data and the purpose of the analysis. If you are not sure which graph to use, it is always a good idea to consult with a statistician or data scientist.