In Microsoft Excel, formatting options are used to customize the appearance of cells. To remove borders, you need to access the specific border formatting tools. Option B, "Choose No Border," is the correct method. You typically select the cells, go to the 'Home' tab, find the 'Borders' dropdown in the 'Font' group, and then select 'No Border' to clear any existing cell borders.
Option A ("Press Enter") is incorrect as pressing Enter confirms cell input or moves the cursor, it does not affect cell borders.
Option C ("Use formula") is incorrect; formulas are for calculations and data manipulation, not for applying or removing visual formatting like borders.
Option D ("Not possible in Excel") is false; removing borders is a fundamental formatting capability in Excel.