C. It happens over a period of time not overnight
d.<span>29,035 feet mount eversest</span>
        
             
        
        
        
Answer: D
Explanation: because the 2 sides on D dont look the same 
(pls mark brainlyest)
 
        
             
        
        
        
The correct answer is multiple sclerosis.
The MS or multiple sclerosis refers to a demyelinating disorder in which the insulating envelopes of the nervous tissues in the spinal cord and the brain get destructed.
This destruction disturbs the tendency of the components of the nervous system to interact, leading to an array of symptoms and signs, involving mental, physical, and on certain occasions psychiatric issues.
 
        
             
        
        
        
The answer is Algae or in plants