Final answer:
The correct use of a block quote does not require quotation marks and allows for a direct, lengthy quotation from a source to be clearly distinguished from the rest of the text. Option b) is incorrect because the page number is typically inside the period, and option a) is incorrect because the author need not be mentioned in the text for a block quote to be used. Hence, the correct option is c) Quotation marks are not used.
Step-by-step explanation:
Block quotes are a crucial aspect of writing when it comes to integrating direct quotations from sources, especially those that are lengthy. They allow writers to include substantial evidence and arguments from a source verbatim within their own work. To effectively format a block quotation, writers should adhere to several key guidelines.
Quotations marks are not typically used in block quotes because the indentation signifies that the text is a direct quote. Therefore, it is true that quotation marks are not used in block quotations. Furthermore, in block quote formatting, the final punctuation mark generally comes before the parenthetical citation, meaning the page number at the end is often inside the period, contrary to the option suggesting it is outside the period. It is not necessary for the author to be mentioned in the text for a block quote to be used; this information can also be included in the parenthetical citation after the block quote if not included in the preceding text.
In summary, the correct statement regarding block quotes is that quotation marks are not used (option c). However, the other options presented are not universally true for block quote usage and thus, the final answer to the question is option c - Quotation marks are not used.