Anonymity and confidentiality are the two strategies used to maintain/protect privacy. For example, there are several ways to secure the anonymity of personal information (i.e., research data). “The most obvious one is to replace actual names with invented ones [i.e., pseudonyms]. Another is to refer to people solely by the roles that they play: doctor, nurse, patient, relative, and so on. Alternatively, first names without second names, or just initials, may be used; or numbers or letters of the alphabet: Informant 1, Informant 2; Doctor A, Doctor B, etc. The correct answer is E.