Answer:
All the answers are correct because research is multifaceted
Explanation:
While doing population studies, it is important to understand the population and they demographic, age, sex, location etc. This could have incredible effects on comparative studies. 
It is also important to maintain an open line of communication to give instructions and follow up on the persons in the event that this kind of data is required. But like with population study the error that often comes into play is the element of human dishonesty. By keeping an open line of communication, the provisions can be made to keep this under check. 
Finally, making sure that all the participants understand what is being asked of them is key to the open line of communication as not to create any misgivings or misunderstanding. 
 
        
             
        
        
        
I believe the correct answer is gender identity disorder.
Body Integrity Identity Disorder (BIID) describes a phenomenon in which physically healthy people feel the constant desire for an impairment of their body. In other words, they are people who want the amputation of one or more healthy limbs or who want paralysis. In some articles, this disorder is compared to gender dysphoria, studying their similarities and differences, and arriving at the conclusion that BIID may be a new type of identity disorder.
 
        
             
        
        
        
Answer:
WANT POINTS BRB WITH YOUR ANSWER
Explanation:
The system with the highest level of government control is communism. In theory, a communist economy is one in which the government owns all or most enterprises. Central planning by the government dictates which goods or services are produced, how they are produced, and who will receive them.
 
        
                    
             
        
        
        
Answer: Gerard experienced a nightmare
Explanation:
Nightmares are scary or unpleasant dreams.
 
 
        
             
        
        
        
Marilyn is in need to be treated by an individual who can respond to the medical model of psychological disorders. It is because base on Marilyn's condition or illness, she needs her sickness to be treated medically, in order to help her in terms of her, having the mental illness.