"Freezing" rows <span>and columns lets you keep headings on the screen as you work with the data in a large worksheet.
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The important point to consider is that you can freeze only rows at the top and columns on the left side of the worksheet and you cannot freeze in the middle of worksheet.The Freeze Panes summon isn't accessible when you're in cell altering mode (that is, you're entering an equation or information in a cell) or when a worksheet is ensured. To scratch off cell altering mode, press Enter or Esc.
when you are going to freeze both rows and columns, you have to freeze them at the same time.</span>
Answer:
this is a tough question but I suggest that you choose c)
Prototype is a working model for a product only for testing purposes
