The reuse of one's previously published material in a new journal article is most appropriate if:

• A. the author submits the same material to multiple journals simultaneously
• B. the material is reused in a different field without acknowledgment
• C. the author changes a few words in the original material without citation
• D. the author properly cites the original source and obtains permission if required

Answer: (D)

Verified step by step guidance

1. Understand the concept of self-plagiarism, which occurs when an author reuses their previously published material without proper citation or permission.
2. Recognize that ethical academic writing requires transparency about the reuse of material to avoid misleading readers or journals about the originality of the content.
3. Identify that submitting the same material to multiple journals simultaneously is considered unethical because it can lead to duplicate publication.
4. Note that reusing material in a different field without acknowledgment still requires proper citation to maintain academic integrity.
5. Conclude that the appropriate practice is to properly cite the original source and obtain permission if required, ensuring honesty and respect for copyright rules.