According to Holley's Theory, for a Sale to Be Ethical

According to Holley's theory, for a sale to be ethical, which of the following conditions must obtain?

A) Both buyer and seller understand what they are giving up and what they are receiving in return.
B) Neither buyer nor seller is compelled to enter into the exchange as a result of coercion.
C) Both buyer and seller are able at the time of the exchange to make rational judgments about costs and benefits.
D) All of the above