Which of the Following Statements Holds True for the Good-Faith

Which of the following statements holds true for the good-faith meeting-of-competition defense as permitted by the Robinson-Patman amendment?

A) It applies to a situation when sellers may select their own customers in good-faith and not in restraint of trade.
B) It applies to a situation when there could be price differentials based on differences in the cost of manufacture, sale, or delivery of commodities.
C) It applies to a situation which involves the setting up barriers to market entry around a product, brand, product line, market, or market segment.
D) It applies to a situation when a seller in good faith may meet the equally low price of a competitor.
E) It applies to a situation when price changes may be made in response to changing conditions such as sales in good faith in discontinuance of business in the goods concerned.