When Sally sat down with her notes to write her essay according to MLA guidelines, she used a 12 point font, 1 inch margins, left only one-space behind each punctuation mark, and single-spaced the entire paper. Which of Sally's choices is NOT standard practice for MLA guidelines?
A) using 1 inch margins
B) using a 12 point font
C) single-spacing the entire paper
D) only putting one space behind each punctuation mark