Which of the Following Is the Objective of the Rule

Which of the following is the objective of the rule of reason rule?

A) To determine whether the requirements of the per se rule have been satisfied.
B) To determine whether, on balance, the activity at issue promotes or restrains competition.
C) To determine whether in a particular situation a horizontal price fixing has actually harmed consumers.
D) To determine if providers of a good acted reasonably in engaging in a boycott.