The answer to your question is b
Answer: Double blind clinical trial
Explanation:
The situation that is seen here is double blind clinical trail in which neither the participant nor the practitioner knows who is receiving the treatment.
This is used to prevent biasing in the experiment which is caused due to demand characteristics or placebo effect.
Here, in this situation the dog handlers and the experimental observer both were blinded to identify the breath sample.
It's dangerous because the brain uses information received by the nerves which coordinate your actions and reactions.
Answer:
The Nucleus
Explanation:
It is the control center of the cell.
