Final answer:
Data markers in sparklines can be used to highlight the minimum value, first quartile, and third quartile of the data.
Step-by-step explanation:
Data markers in sparklines can be used to highlight various values. In this case, you can add data markers to highlight the minimum value (b), first quartile (c), and third quartile (d) of the data.
These values represent important points of reference in the dataset and can help in understanding the distribution and range of the data.