Political parties are
A- people who share beliefs and support to members and election
B- people with shared goals who work together to influence public policy
C- various means of mass communication such as television and radio
D- government agencies that regulate monitor citizens and business
In general, political parties are "A- people who share beliefs and support party members and elections", since it is easier to get a person elected if there is a major political party, such as the Democrats or the Republicans, backing them.