Which ethical level describes behavior that the most people could attain most of the time with diligent effort?

Practical level

Explanation: Ethics could be denied as values, behavior or attitude guiding the conduct exhibited by an individual, defining the boundary between what is morally right and wrong in human conduct and behavior. Ethical levels could be basic, which is just the level required by law to escape being punished. The currently attainable level may be that which is exhibited by most individuals in the society while the PRACTICAL LEVEL OF ETHICS are achievable through disciplined and diligent effort, it requires being constantly aware of one's decision and careful consideration of it's effect on morality before execution.

if interdependence implies a two-way dependence, and if each partner is equally dependent on the other for success, then there is an equal commitment to the making the partnership successful. the advantage is sustainability of the relationship, the disadvantage is that decisions are "democratic" and therefore may take longer to reach and more likely to be a compromise (which is not always the best solution). as the interdependence moves away from equality, the decisions become more influenced by the more independent partner. in the extreme the relationship becomes more dictatorial and more like "master-slave". generally the relationship has less commitment in both directions and is more likely to be temporary.

if one generalizes (and one shouldn't), equity partnerships, which is probably what is implied by interdependence, can be slow to progress or change but durable. the extreme alternative, independent-dependent partnerships tend to be efficient but more fragile.

hope this but you will have to site your own evidence. : )