What is the most common political units used in today's world

Which statement describes a primary role of political parties in citizens engage with the u.s. government? o a.) funding citizens' trips to washington, d.c.. o b.) motivating citizens to take action on political issues. o c.) encouraging citizens to work with members of other parties to create change. o d.) polling citizens to assess their opinions. answer is b.) motivating citizens to take action on political issues.