Final answer:
The biggest advantage of formatting your data into an Excel Table when creating charts is that it automatically extends the data range when new data is added to the table, making the chart dynamic.
Step-by-step explanation:
The biggest advantage of formatting your data into an Excel Table when it comes to creating charts is option d. It automatically extends the data range when new data is added to the table, so the chart becomes dynamic with the new data. This means that as you add or remove data from the table, the chart will automatically update to reflect those changes. For example, if you have a chart that shows sales data for different months, adding a new month's data to the table will automatically update the chart to include that new month's data.