Which of the Following Statements Best Describes the Way in Which

Which of the following statements best describes the way in which political parties perform the function of selecting candidates?

A) The political party is usually the major institution through which the executive and legislative branches cooperate with each other.
B) Political parties help educate the public about important political issues.
C) Political parties narrow the field of candidates through primary elections.
D) Political parties are essentially coalitions-alliances of individuals and groups with a variety of concerns and opinions who join together to support the party's platform, or parts of it.
E) Political parties take care of a large number of small and routine tasks that are essential to the smooth functioning of the electoral process.