What Factors Explain Why Different Types of Agencies Survive for Different

What factors explain why different types of agencies survive for different lengths of time?

A) whether the agency is located in the Executive Office of the President and whether the heads serve for a fixed term
B) whether the agency was the creation of an executive order and whether it falls under the jurisdiction of the White House Office
C) whether the agency has met the standards of the National Performance Review and whether it was created by the Administrative Procedures Act
D) whether the agency is located in the Office of the First Spouse and whether its mandate deals with political issues