what is a sparkline? a text used in tables a type of file extension a small chart that fits into a single cell

Brief Explanations:

A sparkline is a very small chart that is typically embedded within a single cell in a spreadsheet or other data - presentation context, showing trends in data like a line graph, bar graph etc. It is not a text for tables or a file extension.

Answer:

C. A small chart that fits into a single cell