Answer:
C. Suffixes, such as Jr. and Ill.
Explanation:
When citing the names of authors or editors on any works cited page, it is mandatory to include the full details of the author. This includes the suffixes such as "Jr." or "III" as they are a part of the whole name of the author or editor.
While the inclusion of titles such as "Dr. Mr./Mrs. Sir" is not necessary, or even their degrees, it is mandatory to include the suffixes. Middle names are taken in initials and need not be written in full.
Thus, the correct answer is option C.