Which sentence uses the colon correctly

Which statement accurately synthesizes information from this passage's map and the information from the article itself? a) according to vincent, california--because it has 55 delegates--basically chooses the new president of the united states. b) the graphic shows how many senators each state elects to the capitol, while the article describes the duties of each senator once elected. c) championing the usefulness of the electoral college, vincent shows in the graphic how no state has truly any more votes than another state. d) vincent finds it unjust that the votes for president from people in texas count more than the votes of the people of north and south carolina combined.