Which of these diagrams could be suitable for displaying raw discrete data?

Let's review the options:\n- **Frequency polygon:** Joins the midpoints of the tops of bars in a histogram. Used for grouped or continuous data.\n- **Cumulative frequency curve:** Shows the running total of frequencies. Used for grouped continuous data.\n- **Equal width histogram:** Uses bars to show frequency of continuous data within specific intervals. There are no gaps between bars.\n- **Stem-and-leaf diagram:** Organises numerical data by splitting each value into a "stem" (the first digit or digits) and a "leaf" (the last digit). It displays the raw data values in a compact, ordered form. This makes it ideal for raw discrete data.