Borders in applications like Word or Excel can be applied to

Borders are design elements that can be applied across different units of a document including paragraphs text or table cells. In MS Word borders may surround text blocks or entire pages while in Excel they are often used to highlight cells and ranges. This flexibility allows users to improve readability and layout of documents and spreadsheets. Since borders can apply to all these contexts the correct choice is all of these which is option D.