The Insert tab symbol option from the Symbols group is used toAinsert the footerBinsert symbolsCinsert the headerDformat document

To determine the correct answer, let's analyze each option provided based on the functionality of the Insert tab's symbol option in most word processing software:

1. Option A: Insert the footer
   The footer is a section that appears at the bottom of each page in a document. This is typically inserted through the "Insert" tab but is not related to the symbols.

2. Option B: Insert symbols
   This directly corresponds to the function of the "Insert" tab symbol option, which allows users to add special symbols that are not present on the keyboard.

3. Option C: Insert the header
   Similar to the footer, inserting a header is a separate function and is not related to symbols.

4. Option D: Format document
   While formatting is generally done under various options in the menus, it does not specifically relate to the symbol insertion function.

Conclusion

The most accurate answer regarding the function of the Insert tab symbol option is B: insert symbols. This option allows users to include various symbols in the document which enhance content presentation.