My answers are C, E, and F.
A memo is a note to particular people informing them of a new policy or telling them to do something. A memo needs to be short, straight to the point, and easy to read and understand. You should get to the point even before the memo starts in the “Action to Take” option. In the shortest space possible, keep the paragraph lengths very short (4 to 7 sentences typical). I might disagree with option D though. There should be at least two spaces between paragraphs or a blank line. However, the body of the memo should be single-spaced. The last line should tell what is needed or say exactly what action or actions you want taken.