Solution

• The range A1:C9 includes all the cells from A1 to C9, which covers the cells in columns A, B, and C from row 1 to row 9.
• The colon (:) is used in Excel to define a continuous range of cells, starting from the first cell (A1) and extending to the last cell (C9).

Why Other Options are Incorrect:

• (a) A1-C9: This notation is incorrect. The hyphen (-) is not used to define ranges in Excel.
• (c) A1 to C9: This is a textual description of the range but not valid Excel syntax.
• (d) A1$C9: This combines an absolute reference ($) with a cell reference, which doesn't correctly define a range.