At the end of a block quote, where should the source citation be placed?

The correct placement of the source citation at the end of a block quote is to cite the quoted source in parentheses after the final punctuation mark. This practice adheres to the guidelines outlined by the APA style, which specifies that the citation should be included after the punctuation that closes the quote.

By placing the citation after the final punctuation, it maintains the integrity of the quoted material, clearly indicating that the citation pertains to the entire block quote. This format allows readers to easily identify the source of the information while ensuring that the text of the quote is not interrupted by additional elements such as parentheses or footnotes, which could distract from the quoted message itself.

The other options do not align with APA formatting guidelines, which emphasizes clarity and cohesion in referencing sources.