Answer :
When you underline cell content, you are using a: c. font style.
What is a Font Style?
Font style like the name implies, is the format in which the content of a cell appears.
For example, you can format the content of the cell to make it appear underlined.
Therefore, when you underline cell content, you are using a: c. font style.
Learn more about font style on:
https://brainly.com/question/7131436