The horizontal and vertical lines on a spreadsheet are called:

The correct answer is: D. Grid-lines.

Grid-lines are the horizontal and vertical lines that divide a spreadsheet into cells. They help to organize data and make it easier to read.

Cells are the individual boxes that make up a spreadsheet. They are where data is entered and stored.

Sheets are the individual

Block lines are the lines that separate cells into groups. They are used to create tables and other structures.