Final answer:
The MLA rules for citing long quotations include indenting the quotation one-half inch from the left margin, omitting quotation marks, and placing the period after the closing parenthesis of the in-text citation.
Step-by-step explanation:
The correct answer regarding the three MLA rules for citing long quotations is to indent ½ inch from the left margin, omit quote-marks, and ensure the period comes after the parenthesis. When dealing with long quotations in MLA style, which are considered to be more than four lines of prose or three lines of poetry, you should use block format. This involves indenting the entire quotation by one-half inch from the left margin. Quotation marks are not used for block quotations because the indentation clearly signifies that it is a direct quotation from a source. Lastly, after the quotation, you should include your in-text citation enclosed in parentheses, with the period coming after this citation, not before it.
Furthermore, remember to double space the block quotation, just like the rest of your text, and to introduce it with a sentence ending with a colon. Should the block quotation span multiple paragraphs, indent the first line of each subsequent paragraph an additional one-half inch.