Answer: A defendant is deemed insane if they were incapable of knowing what they were doing at the time committing the object offense.
 
        
             
        
        
        
Answer: Central intelligence Agency (CIA)
Explanation:
Central intelligence agency is a civilian foreign agency service of the United States of America, which have been given the responsibility of gathering and analyzing national security information from around the world through it's source; humans or husn intelligence.
 
        
             
        
        
        
the answer is: A cognitive psychologist enrolls undergraduate students for a computer-based study about the effect of mood on problem-solving behaviors. 
Here the requirement for research with human subjects according to the Fed :
"Obtains information or biospecimens through intervention or interaction with the individual, and uses, studies, or analyzes the information or biospecimens; or Obtains, uses, studies, analyzes, or generates identifiable private information or identifiable biospecimens."
The experiment on this ption fulfill the criteria because:
- The experiment should use studies or analytics to obtain some sort of private information from the subjects.  (such as their mood)
- The experiment should make some sort of intervention that can be used to measure its hypothesis. (in the case above, the researchers could put the subject under a certain level of stress before telling them to  solve a set of problems)
- The researchers need to interact with the subject in a certain way. (since the researchers meet the undergraduate directly, it's considered as an interraction)
 
        
             
        
        
        
Depending on the spread of the bloodstain.
Blood stain that spread in large distance within small pebbles usually indicates a hard force such as blunt weapons attack or bullets
If the bloodstain is gushing down like a pool, it indicates a stabbing incidents using sharp objects.
        
             
        
        
        
I am not quite sure what you are saying please ask a question so I may answer it.