Which cells specify a range of data in an Excel worksheet?

The correct choice is that the cells in the upper-left and lower-right corners specify a range of data in an Excel worksheet. When you define a range in Excel, you do so by identifying the starting point and the endpoint of the range. The upper-left cell signifies the beginning of the range, while the lower-right cell indicates the end. This notation is widely recognized in Excel as it allows users to easily specify which subset of data they want to manipulate or analyze.

For example, if you want to highlight a continuous set of cells from A1 to C3, A1 would be the upper-left cell, and C3 would be the lower-right cell. This method of range specification is essential for functions, formulas, and other operations that require a defined set of data.

Other options do not accurately convey how ranges are identified in Excel. Selecting any two cells does not constitute a valid range unless they are positioned as upper-left and lower-right corners, and mentioning the first and last rows does not relate directly to how a range is formed.