Answer:
B. Use the word processing software to enter footnotes.
Explanation:
The following options are missing in the question:
<em>A. Use a Works Cited list instead of footnotes.
</em>
<em>B. Use the word processing software to enter footnotes.
</em>
<em>C. Use an asterisk (*) instead of different numbers for each note.
</em>
<em>D. Use endnotes instead of footnotes.</em>
Word processing software allows the user to enter footnotes and the number associated to each note is automatically generated by the software, so that, if a footnote is deleted all the other footnote's numbers are automatically updated.