Which of the Following Statements About Parties in Congress Is

Which of the following statements about parties in Congress is accurate?

A) Strong political parties exist in the House, but party is weak in the Senate because there are few members.
B) Article I of the Constitution dictates the establishment of political parties to make it easier to resolve differences between the chambers.
C) Party leaders assemble and maintain party coalitions, but they need tools to encourage cooperation, and members have to sacrifice some independence.
D) Organizational reforms have reduced the pressures on Congress so the parties do not play a very important role any more.