Margret wants to use a pre-set design to create her slide presentation. Her presentation will be for an important business partner, so she wants to select something that is professional and has a serious tone. Which of the following options should Margret choose? A. A pre-set design that has an orange background and purple text
B. A pre-set design that has a gray background and red text
C. A pre-set design that has an orange background and yellow text
D. A pre-set design that has a light blue background and black text