Which of These Statements Most Accurately Describes the Nature and Origin

Which of these statements most accurately describes the nature and origin of the Administrative Procedures Act of 1946?

A) It was passed by executive order in order to define the nature and process of bureaucratic decision making
B) It was passed by the Congress in order to define the nature and process of bureaucratic decision making
C) It was passed by the Congress in order to maximize bureaucratic discretion in decision making
D) Both of the last two options