When should double quotation marks be used?

Double quotation marks are used primarily to indicate that a term or phrase is being introduced for the first time or to denote a specific coined expression. Using quotation marks when an invented expression is first mentioned signals that it may be unfamiliar to the reader, setting a clear context for its subsequent use. This approach enhances the clarity of writing and allows readers to recognize that a specific term carries particular significance.

Option B emphasizes the importance of marking the first introduction of an invented expression distinctly with double quotation marks. This practice aligns with APA guidelines, which prioritize clarity and consistency in writing. Therefore, using quotation marks only for the initial appearance ensures that the reader can understand the term's relevance without misunderstanding it as a commonly known concept.

While other choices may discuss the use of quotation marks in different contexts, they do not accurately reflect the specific guideline regarding the initial introduction of terms. Thus, the correct answer underscores the principle of clarity in communicating new concepts to readers.