Which of the Following Statements Is True of an Iron

Which of the following statements is true of an iron triangle

A) An iron triangle is a three-way alliance among the Senate, the House of Representatives, and the president.
B) An iron triangle helps in understanding the federal bureaucracy's role in policymaking.
C) An iron triangle is established in only certain parts of the bureaucracy of the federal government.
D) An iron triangle relationshipapplies to all policy domains.
E) An iron triangle is made up of people with differing policy concerns.