The answer is B, since the question is asking for complete agreement between the partners.
I would say A. Because c and d r very dangerous if u think about it. And b is right in some situations. But if u do a then people can see whts going on if something happened because of the light. and it is safe. If wrong let me know. :D
It depends on the conditions. You would need to specify if this treatment also included surgery, medications, ect.
When western medicine and public sanitation were exported to the least industrialized nations, this caused a surge in their population which outstripped food supply and resulted in malnutrition, mass starvation, and political unrest, this illustrates the description of a Latent Dysfunction.