What Does the Ethical Principle of "Sharing Benefits" Mean

What does the ethical principle of "sharing benefits" mean?

A) all participants in the same study should receive an equal share of the benefits or subject payments
B) all those who belong to the population being studied will share equally from the benefits the study produces
C) the results of studies must be shared with the public so society may benefit from the increased knowledge
D) all groups involved in a study should eventually be given an opportunity to receive any treatments that were found to be effective in the study