Quotations should be set off from the rest of the text with a narrower margin when they reach what length?

Afour lines or longer
Bthree lines
Ctwo lines
Done line

Verified Answer :

According to the MLA guidelines for style, quotations should be set off from the rest of the text with a narrower margin when they reach four lines or longer. Answer A is correct.  

Answer; A
Quotations should be set off from the rest of the text with a narrower margin when they reach four lines or longer. 

Explanation;
A quotation is an exact reproduction of another speaker's or writer's words. It is different from a paraphrase, which involves writing another person's ideas, using your own words. 
Quotation, paraphrase and summary are three ways of incorporating information from other sources into your own writing.