Which of the following spacing should be used in the reference list of an APA paper?

In an APA style reference list, double spacing is required throughout the entire document, including the reference entries, which allows for better readability. The use of double spacing ensures that there is consistent spacing between each line of text within each reference entry as well as between different references. Moreover, a significant aspect of formatting the reference list is that there should be no additional spacing between entries; this means one reference follows directly after another without extra blank lines in between.

This formatting is crucial for maintaining a professional, uniform appearance in scholarly work. Therefore, option C, which states that double spacing should be used with no additional spaces between entries, aligns perfectly with APA formatting guidelines, ensuring clarity and a standardized presentation of the reference list.