Which of the following property of a table element specifies the width that should appear between table cells?

Answer: Option B

The border-spacing property of a table element specifies the width that should appear between table cells. This property allows you to set the distance between the borders of adjacent cells, providing control over the spacing in your table layout. The other options, such as border-collapse, caption-side, and empty-cells, are used for different purposes related to table styling.