You are writing a report on the two candidates competing to represent your district in the u. s. house of representatives. you create a pie chart for each candidate to show where the candidate's campaign money comes from. you use purple for small individual donations, orange for large individual donations, blue for corporate donations, yellow for political action committee (pac) contributions, red for political-party donations, and gray for other money. which principle of using color effectively have you followed? a. using color to create contrast between the text and the background b. using color to create patterns c. using symbolic meanings of colors d. using color to emphasize particular items