Answer:
(C) Permit the client to perform daily rituals to decrease anxiety
Explanation:
Delirium is a Serious mental disorder leading to confused thinking and decreased perception of the surroundings. Delirium can be caused by a serious medical condition, such as an infection, other medications and other factors, such as removal of drugs or intoxication.
The client should be permitted to perform daily rituals to decrease anxiety. Well lightened environment is suggested. 
 
        
             
        
        
        
If you want more of something, you have to incentivize it.
        
             
        
        
        
Yelling at everyone in site 
throwing stuff 
..etc.
        
                    
             
        
        
        
It is a stimulus because parts of the ear respond to exact stimuli which would make this a stimulus. Our bodies make us able to hear normally but some people's bodies are not able to respond to the stimuli which unfortunately explains deaf people. 
Hope this helps! Would love brainliest if possible:)