Answer:
Out of the options given, the best way to improve representation of the population in Congress would be to elect more members who represent races and ethnicities other than White. Currently, Congress is made up of mostly White people, who represent a majority of the population but not the full diversity of the country. By electing more members from different racial and ethnic backgrounds, Congress would better represent the full population. Electing members with college degrees or over the age of 60 would not necessarily help improve representation, as these factors do not necessarily represent the entire population.