Answer: (C) The placebo effect
Explanation:
  The placebo effect is one of the type of treatment that is specifically designed for control all the therapeutic values and this effect is basically works on the various types of symptoms that is generated by our brain.  
It includes the various types of procedures, inert injections and the tablets. The researcher utilized various types of placebo effect controlling system so that they can easily assess our memory. 
  According to the given question, the given situation is due to the placebo effect as they can easily determine the quantity of caffeine in the memory. 
Therefore, Option (C) is correct.
 
        
             
        
        
        
If you live near polluted areas you are more likely to get cancer. Like a home near a power plant. But if you live in a house with nature and plants around it or somewhere not polluted you have less of a chance to get cancer.
        
             
        
        
        
Answer:
Compulsion in OCD
Explanation:
Compulsion in OCD is also called the rituals that occur in response to the obsession. Obsession is related to unwanted thought, intrusive thoughts, that are responsible for stress, anxiety, and depression. People who suffer from OCD become to perform a task to neutralize or to decrease the obsession. It is not a pleasurable behavior. 
It makes people compulsive to perform the task again to release stress anxiety and depression. Compulsion can be called the fuel of OCD. OCD is flamed by the performance of compulsion. If you are omitted the compulsion it's like to cover the flame. So it is not as easy as people think. There are many of treatment used for OCD.  
 
 
        
             
        
        
        
If honesty isn't provided in a document, this will lead to fraud which is intended for personal or financial gain. Hence, deception. The false information given to the public or a figure is deceiving, which may inflict severe consequences to you and to the person who the document was provided to. Therefore, it is vital for honesty to be present.
        
             
        
        
        
Cro-Magnons had better tools, making them better hunters.
They painted on cave walls.