The correct answer is B. Select Format > Money from the menu.
Option A is incorrect because it is not necessary to retype everything and manually add the dollar signs, commas, and decimals. You can use the Format > Money command to format the numbers in your worksheet.
Option C is incorrect because the Currency Style button is not on the formatting toolbar. The Currency Style button is on the Number tab of the Format Cells dialog box.
Option D is incorrect because it is not possible to accomplish this task by any of the other options.