Respuesta :
The answer would be B. The scientists must ADMIT that dreams are mysteries within mysteries.
Answer:
B. To admit.
Explanation:
The word “concede” means, in this context, to admit. What the passage is saying is that all researchers, no matter their personal motivations or scientific tendencies, must admit that, for all we know and for all that science has advanced, there are still mysteries that we cannot answer, and of the them is the science of dreaming, their meaning, their origins, and their purpose.